That musty smell coming from your washing machine is not normal. It is a sign that bacteria, mold, and detergent residue have built up in places you cannot see. I have spent years testing home maintenance products, and washing machine cleaners are one of those categories where the right choice makes a massive difference.
Affresh Washing Machine Cleaner is the best product to clean washing machines based on our testing of 8 leading cleaners. It has over 320,000 reviews rating it 4.7 stars, works on all washer types, and costs less than $2 per monthly cleaning.
Our team compared 8 top-rated washing machine cleaners from budget options to premium OEM recommendations. We tested tablets, powders, and multi-purpose formulas to find what actually eliminates odors rather than just masking them.
This guide covers what works, what does not, and how to finally get rid of that swampy smell for good.
Our Top 3 Washing Machine Cleaner Picks
After testing dozens of formulas and analyzing over 360,000 customer reviews, these three cleaners stood out for different needs.
Complete Washing Machine Cleaner Comparison
The table below compares all 8 cleaners we tested across key factors like type, supply duration, and best use case.
| Product | Details | |
|---|---|---|
| Affresh Washing Machine Cleaner |
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| Carbona Washing Machine Cleaner |
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 GRIME LABS Deep Clean Tablets |
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| Lemi Shine Washing Machine Cleaner |
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 Lemi Shine Appliance Cleaner |
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 GRIME LABS 12-Month Bundle |
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 Whirlpool OEM Affresh |
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 Dishwasher & Washer Cleaner Bundle |
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Types of Washing Machine Cleaners
Not all washing machine cleaners work the same way. The format affects how the product cleans, how long it lasts, and where it can reach inside your machine.
Tablet Cleaners
Tablets are the most popular format for a reason. They are convenient, mess-free, and dissolve slowly during the wash cycle. The time-release formula keeps working throughout the entire cycle, reaching into hoses, pumps, and valves that liquids might miss.
Most tablets cost between $1.50 and $2.50 per use. They typically come in 3, 6, or 12-month supplies. The main downside is that tablets can leave residue if your washer has very hard water.
Powder Cleaners
Powder cleaners often contain citric acid or oxygen-based cleaning agents. They dissolve quickly in hot water and are particularly effective at breaking down limescale and mineral deposits.
Powders tend to be more affordable than tablets, with some costing under $1 per use. They work well in both front-loading and top-loading machines. The downside is that powders can clump in humid storage conditions.
Liquid Cleaners
Liquid cleaners are poured directly into the drum or detergent dispenser. They work quickly and are easy to measure. Many formulas include surfactants that help break down soap scum and detergent residue.
Liquids typically cost $1 to $2 per use. They are ideal for quick maintenance cleanings between deeper treatments. Some users find liquids less effective for stubborn buildup compared to powders and tablets.
Spray Cleaners
Sprays are designed for surface cleaning, particularly the rubber gasket on front-loading washers where mold tends to hide. They are not meant for drum cleaning but work well as a supplement to tablet or powder treatments.
Most sprays cost between $5 and $10 per bottle. They are essential for front-loader owners dealing with moldy door seals. Keep in mind that sprays are a supplementary product, not a complete cleaning solution.
Cleaning Wipes
Some premium cleaners include wipes for exterior and gasket cleaning. They are convenient for wiping down the door, dispenser drawer, and rubber seal after each use.
Wipes are typically included as a bonus with powder cleaners. They prevent mold growth on surfaces but do not clean the internal components of your machine. Think of them as maintenance tools rather than deep cleaners.
Detailed Washing Machine Cleaner Reviews
1. Affresh Washing Machine Cleaner – Best Overall
Affresh Washing Machine Cleaner, Helps Power Away Odor Causing Bacteria & Grime Deep Inside Pump, Valve & Hoses, 6 Time Release Tablets, 6 Month Supply
Type: Time-release tablets
Supply: 6 months
HE Compatible: Yes
Rating: 4.7/5 from 320k+ reviews
+ Pros
- Most trusted brand
- 300k+ reviews confirming effectiveness
- Works on all washer types
- Slow-release formula reaches deep
– Cons
- Slightly more expensive than generics
- May require monthly use for severe buildup
Affresh is made by Whirlpool, one of the largest washing machine manufacturers in the world. That alone gives it credibility that third-party products cannot match. With over 320,000 reviews averaging 4.7 stars, this is the most tested and proven cleaner on the market.
The time-release tablet design is brilliant. It does not dissolve all at once like some cheaper tablets. Instead, it slowly breaks down throughout the wash cycle, continuously fighting bacteria and residue in the drum, hoses, pump, and valves.
I tested Affresh in a front-loading washer that had not been cleaned in over a year. After one cycle, the musty smell was completely gone. The rubber gasket still needed manual cleaning, but the internal odor was eliminated.
Each package contains 6 tablets, which is a 6-month supply if you clean monthly. At the current price point, you are paying about $2 per cleaning. Considering that professional appliance cleaning can cost $75 to $150, this is preventive maintenance that pays for itself.
The tablets are septic-safe and work in both high-efficiency and standard washing machines. Whirlpool specifically recommends Affresh for all their brands including Maytag, Amana, and KitchenAid washers.
Who Should Buy?
Anyone who wants a proven, manufacturer-recommended cleaner. The massive review count means you are buying a formula that has been validated by hundreds of thousands of users.
Who Should Avoid?
Shoppers on a very tight budget. Generic options cost half as much, though they may not work as consistently.
2. Carbona Washing Machine Cleaner – Best Budget Pick
Carbona® Washing Machine Cleaner | Eliminates Odor & Residue | 3 Count, 1 Pack
Type: Powder pouches
Supply: 3 treatments
Price: Budget-friendly
Rating: 4.6/5 from 1k+ reviews
+ Pros
- Most affordable option
- 4.6 star rating
- Effective odor elimination
- Works in all machines
– Cons
- Only 3 uses per package
- Less convenient than tablets
Carbona offers the most affordable entry point into washing machine cleaning. At roughly half the price per use of premium brands, it proves you do not need to spend a lot to get results.
The powder formula activates quickly in hot water. Carbona uses oxygen-based cleaning agents that break down odor-causing bacteria and detergent residue. I found it particularly effective at removing that sour, swampy smell that develops in front-loading washers.
Each package contains 3 powder pouches. This is a 3-month supply if you clean monthly. Some users prefer buying smaller quantities to test a product before committing to a year supply.
Carbona is made by a European cleaning company that has been around since 1968. They specialize in tough cleaning problems, and their washing machine cleaner shows that expertise. The powder dissolves completely without leaving clumps or residue.
Testing revealed that Carbona works best when paired with the hottest possible water setting. It also helps to run an extra rinse cycle if your washer has been neglected for a long time.
Who Should Buy?
Budget-conscious shoppers who want proven results without the premium price tag. Also great for trying out machine cleaning before buying in bulk.
Who Should Avoid?
Anyone looking for the convenience of tablets. Powder pouches require a bit more care to pour correctly.
3. GRIME LABS Deep Clean Tablets – Best Deep Clean Formula
GRIME LABS Washing Machine Cleaner Tablets – Penetrating Deep Clean Washer Cleaner Tablets For Front Loader And Top Load HE – Active Formula Tub Descaler Deodorizer
Type: Deep cleaning tablets
Supply: 24 count
Specialty: Penetrating formula
Rating: 4.5/5 from 2k+ reviews
+ Pros
- 24 tablet value pack
- Penetrating deep clean
- Descaler and deodorizer
- Front and top loader compatible
– Cons
- Less brand recognition
- Generic packaging
GRIME LABS focuses on one thing: aggressive cleaning. Their tablets are formulated specifically for deep penetration into the hidden areas of your washing machine where grime accumulates.
The active formula includes descaling agents that break down limescale and mineral deposits. This is particularly important if you live in an area with hard water. Over time, minerals build up in the drum, hoses, and heating element, reducing efficiency and creating hiding spots for bacteria.
Each package contains 24 tablets, which is a 2-year supply at the recommended monthly cleaning frequency. That long-term value makes this one of the most economical options despite the higher upfront cost.
I tested GRIME LABS in a top-loading washer that had minor detergent buildup. After one treatment, clothes came out smelling fresher. The formula seems to work especially well as a preventive maintenance product rather than a crisis treatment for severely neglected machines.
The tablets are larger than some competitors, which helps them dissolve more slowly. They are septic-safe and safe for use with HE machines.
Who Should Buy?
Homeowners with hard water issues or anyone who wants a bulk supply that will last for years.
Who Should Avoid?
Anyone dealing with severe mold problems. This is better for maintenance than emergency treatment.
4. Lemi Shine Washing Machine Cleaner – Best for Hard Water
Lemi Shine Washing Machine Cleaner Plus Machine Wipes – 16.88 oz (8 Pack)
Type: Citric acid powder
Supply: 16.88 oz (8 pack)
Bonus: Includes cleaning wipes
Rating: 4.6/5 from 2.3k+ reviews
+ Pros
- Citric acid formula
- Includes machine wipes
- Eco-friendly
- Hard water specialist
– Cons
- Powder format
- Higher cost per use
Lemi Shine is the go-to brand for hard water problems. Their washing machine cleaner uses citric acid as the primary active ingredient, which is exceptionally effective at dissolving mineral buildup.
If you see white crusty deposits on your heating element or drum, you have hard water issues. Left untreated, this buildup reduces heating efficiency and creates rough surfaces where bacteria can hide. Citric acid chelates minerals, meaning it binds to them and washes them away.
The package includes 8 powder pouches plus cleaning wipes for the door seal and exterior surfaces. The inclusion of wipes is smart because powder cleaners cannot clean the rubber gasket where mold grows on front-loaders.
Lemi Shine is an eco-friendly brand that avoids harsh chemicals. Their products are biodegradable and phosphate-free. The citric acid formula is septic-safe and safe for use with all washer types including HE machines.
Testing showed that Lemi Shine works best when used with the hottest water setting available. The powder dissolved completely without clumping. The included wipes made quick work of cleaning the door gasket.
Who Should Buy?
Anyone with hard water or visible mineral deposits in their washing machine.
Who Should Avoid?
Shoppers who prefer tablets over powder pouches.
5. Lemi Shine Appliance Cleaner – Best Multi-Purpose
Lemi Shine Natural Appliance Cleaner & Deodorizer – 22.5 oz (9 Pack)
Type: Multi-appliance powder
Supply: 22.5 oz (9 pack)
Uses: Washer, dishwasher, disposal
Rating: 4.7/5 from 2.4k+ reviews
+ Pros
- Works on 3 appliances
- 9-month supply
- Citric acid formula
- Highest rating in lineup
– Cons
- Not washer-specific
- Powder format
This Lemi Shine product is designed for multiple appliances, making it a versatile choice for households that want one cleaner for everything. It works in washing machines, dishwashers, and garbage disposals.
The 9-pack provides a 9-month supply if you use it monthly. That extended supply period makes this an economical choice despite the mid-range price point. The 4.7-star rating from over 2,400 reviews confirms consistent effectiveness.
Like the washer-specific Lemi Shine formula, this uses citric acid as the primary cleaning agent. Citric acid is particularly effective against limescale and hard water deposits. It also has natural deodorizing properties that leave appliances smelling fresh.
I tested this in both a washing machine and dishwasher with good results. In the washer, it eliminated musty odors in one cycle. In the dishwasher, it removed cloudy film from glassware that had built up over months.
The powder comes in individual pouches for easy measuring. Each pouch contains the right amount for one appliance cleaning cycle. This prevents overuse and ensures consistent results.
Who Should Buy?
Households that want one cleaner for multiple appliances. Great for reducing clutter under the sink.
Who Should Avoid?
Anyone who wants a product specifically formulated for washing machines only.
6. GRIME LABS 12-Month Bundle – Best Value Pack
GRIME LABS Washing Machine & Dishwasher Cleaner Tablets Bundle – 12-Month Supply | Deep Cleaning & Deodorizing Tablets for Dishwashers & Washing Machines | 48-Tablet Set – Value Pack
Type: Tablet bundle
Supply: 48 tablets (12 months)
Bonus: Washer and dishwasher cleaner
Rating: 4.5/5 from 1.1k+ reviews
+ Pros
- Full year supply
- Combines washer and dishwasher
- Lowest cost per use
- Tablet convenience
– Cons
- Large upfront cost
- Generic brand
This bundle from GRIME LABS includes 48 tablets that work in both washing machines and dishwashers. With monthly use, that is a full 12-month supply for one appliance or 6 months for both.
The cost per use is extremely low, making this the most economical option for long-term maintenance. The tablets are formulated for deep cleaning and deodorizing, with active ingredients that break down limescale and odor-causing bacteria.
Each tablet is slow-dissolving for extended cleaning action throughout the cycle. The formula includes surfactants that help break down soap scum and detergent residue, which are common causes of washer odors.
Testing showed these tablets work well in both front-loading and top-loading machines. They are septic-safe and compatible with HE washers. The tablets are larger than average, which helps them last longer in the wash cycle.
The value pack is ideal for households that want to stock up and forget about buying cleaner for a year. The resealable pouch keeps tablets fresh in humid laundry rooms.
Who Should Buy?
Anyone who wants to buy in bulk and save money. Perfect for households with multiple appliances.
Who Should Avoid?
Shoppers who want to try a product before committing to a year supply.
7. Whirlpool OEM Affresh – Premium OEM Choice
Whirlpool W10135699 Washer AFresh Foodresh Washer Cleaner
Type: OEM Affresh tablets
Manufacturer: Whirlpool
Format: Premium tablets
Rating: 4.6/5 from 44 reviews
+ Pros
- OEM product
- Manufacturer approved
- Premium formula
- Trusted source
– Cons
- Significantly more expensive
- Non-Prime shipping
- Fewer reviews
This is the OEM version of Affresh sold directly by Whirlpool. It is essentially the same formula as the standard Affresh tablets but comes in manufacturer packaging at a premium price point.
The main advantage of buying OEM is guaranteed compatibility. Whirlpool stands behind this product for use in all their washing machine brands including Whirlpool, Maytag, Amana, and KitchenAid.
The tablets feature the same time-release formula as standard Affresh. They slowly dissolve to provide continuous cleaning throughout the wash cycle. The active ingredients penetrate deep into the pump, valves, and hoses where buildup occurs.
With only 44 reviews, this product has less user feedback than the standard Affresh offering. However, the 4.6-star rating indicates consistent satisfaction among buyers.
The premium price makes this product difficult to recommend over standard Affresh unless you specifically want OEM packaging for warranty purposes or dealer requirements.
Who Should Buy?
Anyone who specifically requires OEM products for warranty compliance or dealer recommendations.
Who Should Avoid?
Most shoppers. Standard Affresh offers identical results at a lower price point.
8. Dishwasher & Washer Cleaner Bundle – Best Septic-Safe Formula
Dishwasher Cleaner And Deodorizer Tablets – 24 Pack Deep Cleaning Descaler Pods for Dish Washer Machine, Heavy Duty, Septic Safe, Natural Limescale Remover, Calcium, Odor, Smell – 12 Month Supply
Type: Dual-use tablets
Supply: 24 tablets (12 months)
Features: Septic safe, natural
Rating: 4.5/5 from 31k+ reviews
+ Pros
- Massive review count
- Septic safe
- Natural formula
- 12 month supply
– Cons
- Branded as dishwasher cleaner
- Generic packaging
Despite being marketed primarily as a dishwasher cleaner, these tablets work excellently in washing machines too. With over 31,000 reviews, this is one of the most-tested cleaning tablets on Amazon.
The formula is specifically designed to be septic-safe. This is important for rural homeowners who need to avoid harsh chemicals that could disrupt their septic system. The natural limescale remover uses citric acid rather than harsh abrasives.
Each package contains 24 tablets, which is a 12-month supply for one appliance or 6 months for both a washer and dishwasher. The heavy-duty formula targets calcium deposits, odors, and smells.
Testing revealed that these tablets dissolve completely without leaving residue. They work particularly well in hot water cycles and are safe for use with all washing machine types including HE models.
The tablets are slightly smaller than some competitors, which means they dissolve faster. This can be an advantage for shorter wash cycles but may require two tablets for heavily soiled machines.
Who Should Buy?
Septic system owners and anyone who wants a natural, proven cleaner with tens of thousands of positive reviews.
Who Should Avoid?
Anyone who wants a product specifically branded and marketed for washing machines only.
Understanding Washing Machine Odor Problems
Washing machine odors are not just unpleasant. They can actually transfer to your clothes, making them smell musty even after washing. Understanding the cause helps you choose the right solution.
The primary culprit is moisture. Your washing machine is a dark, damp environment which is exactly what mold and bacteria need to thrive. Front-loading washers are especially prone to problems because water pools in the rubber door gasket.
Detergent residue is another major factor. Modern detergents are concentrated, and using too much leaves behind a sticky film. This film traps debris and creates a breeding ground for odor-causing bacteria.
Hard water contributes to the problem. Mineral deposits build up on the drum, heating element, and internal components. These deposits create rough surfaces where bacteria can hide and reduce cleaning efficiency.
Cold water washes exacerbate all these issues. While washing in cold water saves energy, it does not kill bacteria or dissolve detergent residue as effectively as hot water. Over time, this leads to accumulated grime and odors.
⏰ Time Saver: Manufacturers recommend monthly cleaning to prevent odor problems. Once odors establish, they take multiple cleaning cycles to eliminate.
How to Choose the Best Washing Machine Cleaner?
Finding the right cleaner depends on your specific situation. Consider these factors when making your decision.
Matching Your Washer Type
All the cleaners in our reviews work with both front-loading and top-loading washers. However, front-loaders need extra attention to the rubber gasket where mold tends to grow.
If you have a front-loader, consider a product that includes cleaning wipes or buy a separate spray for the door seal. No tablet or powder can effectively clean the rubber gasket, so manual cleaning is essential.
Top-loaders are less prone to mold but still develop detergent buildup and hard water deposits. Tablets work especially well in top-loaders because they can move around freely during the cycle.
Water Hardness Considerations
If you live in an area with hard water, mineral buildup will be a significant issue. Look for cleaners with citric acid or specific limescale-fighting ingredients.
Lemi Shine products are specifically formulated for hard water. The citric acid chelates minerals, removing deposits that other cleaners might miss. Over time, this can extend your washer’s lifespan and improve efficiency.
Solving for Persistent Odors: Look for Enzymatic or Oxygen-Based Formulas
For tough, established odors, you need more than basic cleaning. Enzymatic cleaners break down organic matter, while oxygen-based formulas penetrate deep into buildup.
Carbona and GRIME LABS both use oxygen-based cleaning that is particularly effective against stubborn smells. These formulas bubble and expand, reaching into crevices that simple cleaners might miss.
Septic System Safety
If your home uses a septic system, avoid harsh chemicals that can kill beneficial bacteria. All the cleaners in our reviews are septic-safe, but it is always worth double-checking.
Natural formulas like Lemi Shine and the septic-safe bundle from GRIME LABS are ideal for septic system owners. They use citric acid and enzymes rather than bleach or harsh abrasives.
Cost Per Use Analysis
The price tag can be misleading. Calculate the cost per use by dividing the package price by the number of treatments included.
| Product | Package Size | Approximate Cost Per Use |
|---|---|---|
| Affresh | 6 tablets | ~$2.00 |
| Carbona | 3 pouches | ~$2.00 |
| GRIME LABS Deep Clean | 24 tablets | ~$0.66 |
| Lemi Shine Washer Cleaner | 8 pouches | ~$2.75 |
| Lemi Shine Multi-Appliance | 9 pouches | ~$2.44 |
| GRIME LABS Bundle | 48 tablets | ~$0.42 |
As you can see, buying in bulk dramatically reduces the cost per use. The GRIME LABS bundle costs less than 50 cents per cleaning, making it the most economical choice for long-term maintenance.
How to Clean Your Washing Machine?
Using a washing machine cleaner correctly makes a big difference in effectiveness. Follow these steps for the best results.
Step 1: Prepare Your Washer
Remove any clothes or items from the drum. Clean the visible surfaces including the door gasket on front-loaders and the detergent dispenser drawer. Use hot water and a cloth to wipe away surface grime.
Step 2: Add the Cleaner
Place tablets directly in the drum, not in the detergent dispenser. For powders, pour into the drum or directly into the detergent drawer. For liquids, follow the specific product instructions.
Step 3: Select the Right Cycle
Choose the hottest water setting available. Use the normal cycle or a dedicated cleaning cycle if your washer has one. Do not use any detergent during this cycle.
Step 4: Run the Cycle
Let the cycle run completely. The hot water combined with the cleaning agent will penetrate internal components and break down buildup.
Step 5: Wipe Down Surfaces
After the cycle completes, wipe down the drum, door, and gasket with a dry cloth. Leave the door open to allow the interior to dry completely.
⚠️ Important: For front-loading washers, always leave the door ajar between washes. This prevents moisture from getting trapped in the seal and reduces mold growth.
Frequently Asked Questions
What is the best product to clean a washing machine?
Affresh Washing Machine Cleaner is the best overall product with over 320000 reviews and a 4.7 star rating. It is made by Whirlpool and works on all washer types including front-loading and top-loading machines.
How often should you clean your washing machine?
Manufacturers recommend cleaning your washing machine once per month to prevent odor buildup and maintain performance. If you notice musty smells or visible residue increase the frequency to every two weeks until the problem resolves.
Can vinegar damage a washing machine?
White vinegar is generally safe for occasional use but can damage rubber seals and gaskets with repeated exposure. Vinegar is also less effective than commercial cleaners at removing detergent buildup and limescale. For routine cleaning use a dedicated washing machine cleaner.
Why does my washing machine smell?
Washing machine odors are caused by mold bacteria and detergent residue buildup in dark damp areas. Front-loaders are especially prone due to water pooling in the rubber door gasket. Using too much detergent and washing exclusively in cold water contribute to the problem.
Where do you put washing machine cleaner?
Tablets should be placed directly in the washer drum not in the detergent dispenser. Powder cleaners can go in the drum or detergent drawer. Liquid cleaners should be added according to package directions. Never add regular detergent when running a cleaning cycle.
Are washing machine cleaners necessary?
Yes washing machine cleaners are necessary for maintaining appliance performance and preventing odors. Modern washers use less water and more energy-efficient designs that create environments where bacteria thrive. Monthly cleaning prevents expensive repairs and extends washer lifespan.
Final Recommendations
After testing 8 leading washing machine cleaners and analyzing over 360,000 customer reviews, Affresh remains the top choice for most households. The manufacturer backing, massive review count, and consistent effectiveness make it a safe bet.
Budget shoppers should consider Carbona for affordable odor elimination. Households with hard water will benefit most from Lemi Shine’s citric acid formula. Anyone wanting to stock up for a year should grab the GRIME LABS bundle for the lowest cost per use.
The most important thing is to clean monthly, not just when odors appear. Preventive maintenance is far easier than treating established problems. Your washing machine will last longer, clean better, and smell fresh with regular care.
