9 Best Washing Machine Cleaner To Remove Mold of 2026 For Gasket Stains and Mildew

1

Maravello Washing Machine Cleaner | Professional Washing Machine Cleaning Tablets

View on Amazon

• TAR Score

  TAR Score is a ranking system developed by TopAppliancesReviews.com. TAR score has no relationship or impact from any manufacturers or sales agent websites. Learn more

  10.0
• Brand
  Maravello

Key specs2

Form Factor & Application

Dissolving cycle tablets designed for full drum flushes in front load and top load machines.

Supply Count

6 tablets (6-month supply)

Pros & cons32

Pros

• Formulated for both front load and top load washing machine tubs
• Blue and white dissolving tablet targets drum residue, dirt, and trapped odors
• Packaged as a compact 6-count supply designed for routine monthly cleaning

Cons

• Cycle tablet format flushes the wash tub but cannot cling to vertical door gaskets
• Package does not list septic-system compatibility or High Efficiency certification

2

Affresh Washing Machine Cleaner, Cleans Front Load and Top Load

View on Amazon

• TAR Score

  TAR Score is a ranking system developed by TopAppliancesReviews.com. TAR score has no relationship or impact from any manufacturers or sales agent websites. Learn more

  9.2
• Brand
  Affresh

Key specs2

Washer Compatibility

Explicitly rated for High Efficiency (HE), standard front load, and top load washers.

Package Size

6 tablets

Pros & cons32

Pros

• Labeled for compatibility with High Efficiency, front load, and top load washers
• Tablet design dissolves during normal clean-washer cycles to target internal tub buildup
• Six-tablet pack covers half a year of routine monthly maintenance

Cons

• Tablets circulate in water and cannot treat vertical rubber gasket mold directly
• Listing does not specify septic system compatibility on the product package

3

OxiClean Washing Machine Cleaner with Odor Blasters, 4 Count

View on Amazon

• TAR Score

  TAR Score is a ranking system developed by TopAppliancesReviews.com. TAR score has no relationship or impact from any manufacturers or sales agent websites. Learn more

  9.2
• Brand
  OxiClean

Key specs2

Odor Treatment

Formulated with Odor Blasters to neutralize persistent laundry and tub odors.

Treatment Quantity

4 treatments per pack

Pros & cons32

Pros

• Incorporates Odor Blasters formula to target sour laundry and drum mildew smells
• Dissolves inside the wash basket during cleaning cycles to reach internal components
• Compact 4-count pack provides routine drum freshening

Cons

• Four treatments per package provide fewer cycles than larger multi-packs on this page
• Wash-cycle cleaner cannot cling to vertical door boot seals where dark mold spots root

4

Washing Machine Cleaner Descaler 24 Pack - Deep Cleaning Tablets

View on Amazon

• TAR Score

  TAR Score is a ranking system developed by TopAppliancesReviews.com. TAR score has no relationship or impact from any manufacturers or sales agent websites. Learn more

  9.0
• Brand
  ACTIVE

Key specs3

Formula Action

Natural effervescent foaming action converts into scrubbing powder when exposed to wash water.

Septic System Safety

Septic safe

Supply Duration

24 tablets (12-month supply)

Pros & cons42

Pros

• Effervescent foaming tablets break down into scrubbing powder to strip grime and scale
• Explicitly labeled septic safe and compatible with both High Efficiency and top loaders
• Includes 24 tablets to provide a full 12-month supply of routine maintenance
• Compatible with major brands including GE, LG, Samsung, Whirlpool, Maytag, and Electrolux

Cons

• In-drum cycle tablets rinse away and cannot adhere to vertical gasket mold like gels
• Stated by the manufacturer as not intended for dryer use

5

Eco-Gals Eco Swirlz Washing Machine Cleaner, 24 Count

View on Amazon

• TAR Score

  TAR Score is a ranking system developed by TopAppliancesReviews.com. TAR score has no relationship or impact from any manufacturers or sales agent websites. Learn more

  9.0
• Brand
  ECO-GALS

Key specs2

Total Quantity

24 tablets per pack

Application Method

In-cycle dissolving tablet designed for wash basin cleaning and deodorizing.

Pros & cons32

Pros

• Bulk 24-count package provides extended supply for ongoing monthly tub flushes
• Tablet format dissolves in water to deodorize internal wash tub surfaces
• Formulated under the Eco Swirlz line for routine washer cleaning

Cons

• Product listing does not detail septic certification or machine type compatibility
• In-wash dissolving tablets cannot remain in contact with vertical rubber door seals

6

Renuv Washing Machine Cleaner Descaler For Front Load, Top Load

View on Amazon

• TAR Score

  TAR Score is a ranking system developed by TopAppliancesReviews.com. TAR score has no relationship or impact from any manufacturers or sales agent websites. Learn more

  8.8
• Brand
  Renuv

Key specs2

Tablet Weight & Dissolve Rate

40g slow-dissolving tablet

Plumbing Compatibility

Formulated as eco-friendly and septic safe for standard and HE drainage.

Pros & cons32

Pros

• Heavy-duty 40g slow-dissolving tablet size keeps active cleaner circulating longer
• Labeled eco-friendly and septic safe for worry-free drainage into home plumbing
• Compatible with High Efficiency, standard front load, and top load washing machines

Cons

• Wash cycle cleaner cannot stick to vertical rubber gaskets to lift deep surface stains
• Listing does not specify the exact tablet count included in the box

7

True Fresh Washing Machine Cleaner Tablets, 15 Solid Deep Cleaning

View on Amazon

• TAR Score

  TAR Score is a ranking system developed by TopAppliancesReviews.com. TAR score has no relationship or impact from any manufacturers or sales agent websites. Learn more

  8.8
• Brand
  True Fresh

Key specs2

Cycle Instructions

Dissolves in Clean Washer or hot water cycles, followed by a simple cloth wipe of the tub.

Major Brand Compatibility

• LG, GE, and Whirlpool
• Samsung, Electrolux, and Maytag
• Standard and High Efficiency models

Pros & cons42

Pros

• Breaks down into deep scrubbing powder that dissolves slowly through hot water cycles
• Broad compatibility covers HE, standard front loader, and top loader models
• 15-pack supply supports more than a full year of once-a-month washer maintenance
• Requires simple wipe-down of the tub with a cloth after running the clean cycle

Cons

• Cycle tablet rinses through the drum and does not cling to vertical front-loader gaskets
• Product specifications do not confirm septic-safe listing on the packaging

8

Sugelary Mold Remover Gel, Household Mold Cleaner for Washing Machine,

View on Amazon

• TAR Score

  TAR Score is a ranking system developed by TopAppliancesReviews.com. TAR score has no relationship or impact from any manufacturers or sales agent websites. Learn more

  7.8
• Brand
  Sugelary

Key specs3

Surface Contact & Dwell Time

Clinging gel formula stays in place on vertical seals for 5 to 8 hours before wipe-away.

Targeted Cleaning Area

Rubber door gaskets and silicone seals

Nozzle & Dispenser Design

Two-piece screw-top precision tip

Pros & cons42

Pros

• Clings directly to vertical rubber door gaskets where dissolving cycle tablets cannot reach
• Precision screw-tip nozzle allows controlled application directly into rubber gasket folds
• Lifts stubborn dark mold stains after 5 to 8 hours without requiring abrasive scrubbing
• Multipurpose formula also works on refrigerator seals, silicone sealant, and bathroom grout

Cons

• Designed solely for surface mildew stains and does not clean internal drum mechanics or pipes
• Requires 5 to 8 hours of dwell time before wiping or rinsing clean

9

Sugelary Mold Remover Gel, Household Washing Machine Cleaner for Washing

View on Amazon

• TAR Score

  TAR Score is a ranking system developed by TopAppliancesReviews.com. TAR score has no relationship or impact from any manufacturers or sales agent websites. Learn more

  7.8
• Brand
  Sugelary

Key specs2

Targeted Washer Component

Formulated for direct spot application on rubber door seals, boot gaskets, and grout lines.

Multi-Surface Utility

• Washing machine door gaskets
• Refrigerator door strips
• Kitchen and shower grout

Pros & cons32

Pros

• Surface-clinging gel formulation stays adhered to vertical washing machine door seals
• Targets embedded rubber gasket mildew that regular water-dissolving tablets rinse past
• Multipurpose application covers washer seals, refrigerator strips, grout, and sinks

Cons

• Does not clean inside the hidden wash tub mechanics, drain pump, or internal hoses
• Requires manual spot application and waiting time rather than running an automated cycle

Last update on 2026-10-09 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API

How do you remove black mold stuck to a front load rubber gasket?

Apply a surface-clinging mold remover gel directly onto the rubber seal rather than relying on a drum wash cycle alone. Liquid cleaners and wash cycles drain away before they can soak into vertical rubber, leaving rooted stains intact. A targeted formula like Sugelary mold remover gel is made for washing machine seals and silicone; you apply the gel in 5 minutes and allow 5 to 8 hours for it to lift stubborn discoloration before wiping it away.

Will a washing machine cleaner tablet clear mold behind the drum or just cover the odor?

Dissolving cleaner tablets actively break down grime and flush out the drum mechanics instead of simply masking sour smells with fragrance. Effervescent foaming tablets circulate through the stainless steel basket, water lines, and outer tub seal to loosen detergent scum where mildew feeds. Using dedicated washing machine deep cleaning tablets during a hot cycle strips away built-up sludge, eliminating the actual breeding ground for sour odors.

Do you need an effervescent tablet, a powder, or a targeted mold gel?

The right format depends entirely on where the mold is concentrated inside your washer. If black spots are embedded in the rubber door boot or perimeter seals, a clinging gel is necessary because it stays on vertical surfaces for 5 to 8 hours to penetrate the material. For mildew, scale, and stagnant smells trapped deep within the internal basket and pump lines, effervescent tablets dissolve into the wash water to clean areas your hands cannot reach.

Are washing machine mold cleaners safe for septic systems and High Efficiency washers?

Yes, many standard washer cleaning tablets are formulated specifically for High Efficiency (HE) machines and septic systems. Effervescent options like the Washing Machine Cleaner Descaler tablets and Renuv tablets are explicitly labeled as septic safe and work in low-water HE cycles without creating excess suds. To protect your plumbing and equipment, verify on the product label that the tablets are septic safe before running them through your machine.

Do washer cleaning tablets work across different machine brands and styles?

Yes, universal washing machine cleaner tablets are compatible with both standard top load and front load washers across major brands. Formulations like True Fresh, Maravello, and the 24-pack descaler tablets are engineered to work with brands such as GE, LG, Samsung, Whirlpool, Maytag, and Electrolux without damaging internal components. If you notice persistent smells lingering after regular washes, pairing an approved cleaner to stop sour odors with a hot maintenance cycle ensures the entire tub interior gets flushed clean.