If your clean laundry comes out smelling musty, or you have peeled back the rubber door seal and found black speckles staring back at you, your washer has a mold problem. Choosing the best mold remover for washing machine problems is only half the job. You also need the right routine to actually kill the mold, clear it out of the hidden crevices, and fix the moisture conditions that let it grow. This guide walks through the top products, exactly how to use them, and how to keep mold from coming back.
Front-loading washers are the most common victims because their airtight rubber gaskets trap water and detergent residue after every wash. That warm, damp, food-rich pocket is a perfect home for mold and mildew. Top-loaders are not immune either, especially high-efficiency models. The good news is that with the right cleaner and about 20 minutes of hands-on work, you can knock it out.
What Makes a Good Washing Machine Mold Remover
Not every cleaner belongs in a washer. The best mold removers for this job share a few traits. They actually kill mold rather than just masking odor. They are safe for rubber gaskets, stainless drums, and internal seals. They rinse away cleanly so no residue transfers to your clothes. And they are labeled as safe for septic systems if you have one. Watch out for one hard rule: never mix bleach and vinegar, and never mix bleach with any product containing ammonia. Combining them releases toxic chlorine or chloramine gas. Pick one approach per cleaning session and rinse thoroughly before switching.
The Best Mold Removers for Washing Machines
1. Affresh Washer Cleaner Tablets
Affresh is the most widely recommended washer tablet and is approved by most major manufacturers, including Whirlpool and Maytag. Each tablet dissolves slowly to break down detergent buildup and the biofilm mold clings to. A pack of 5 tablets runs about $12 to $18. Drop one tablet in the empty drum and run the tub-clean or hottest cycle. It is the easiest routine-maintenance option, though for a heavy existing mold problem you will still want to scrub the gasket by hand.
2. Distilled White Vinegar
Plain white vinegar is the cheapest effective option at roughly $3 to $5 a gallon, and its acetic acid kills many common household mold species. Pour 2 cups into the drum (or the detergent dispenser) and run a hot cycle. Vinegar is gentle on rubber, septic-safe, and leaves no residue. It is a great all-around choice, especially combined with a baking soda scrub for the gasket.
3. RMR-86 Instant Mold Stain Remover
When you have visible black staining on the gasket that will not scrub away, RMR-86 is a powerful spot treatment, priced around $18 to $25 a bottle. Spray it directly on the stained rubber, let it dwell for a few minutes, and wipe. It is strong stuff, so use it in a well-ventilated room with gloves and eye protection, and rinse the gasket thoroughly afterward so nothing transfers to clothing.
4. Oxygen Bleach (Sodium Percarbonate) Cleaners like OxiClean
Oxygen bleach is a gentler, color-safe alternative to chlorine bleach that still tackles mold and odor. Add a scoop to the drum and run a hot tub-clean cycle. It costs about $10 to $15 for a tub and is a good choice if you want cleaning power without chlorine fumes or the risk of damaging seals over time.
5. Chlorine Bleach (For Stubborn Cases Only)
Regular chlorine bleach kills mold effectively and disinfects the drum. Add about 1/2 to 1 cup to the bleach dispenser and run the hottest, longest cycle empty. Use it sparingly, since frequent bleach use can degrade rubber gaskets and seals. Never combine it with vinegar or any other cleaner, and always run a second rinse cycle before washing clothes.
Step-by-Step: How to Remove Mold From Your Washer
Here is the complete routine that works on both front- and top-loaders. Set aside about 20 minutes of hands-on time plus a cleaning cycle.
Step 1: Gear Up and Ventilate
Put on rubber gloves and, if you are using a strong spray like RMR-86 or bleach, wear eye protection and open a window. Mold spores and cleaner fumes are both worth avoiding.
Step 2: Clean the Rubber Gasket (Front-Loaders)
The door gasket is where mold hides. Peel back the folds carefully. You will often find trapped hair, lint, coins, and black gunk. Wipe out the debris, then spray or wipe the rubber with your chosen cleaner. A paste of baking soda and water plus an old toothbrush works well for scrubbing the crevices. Let a mold-killing spray or vinegar dwell for 5 to 10 minutes before the final wipe.
Step 3: Clean the Dispenser Drawer
Pull out the detergent and fabric-softener drawer, if removable. These trap slimy residue that feeds mold. Soak the drawer in hot water with a little vinegar or dish soap, scrub with a brush, and clear the recess it sits in with a bottle brush.
Step 4: Run a Hot Tub-Clean Cycle
Add your main cleaner to the empty drum: an Affresh tablet, 2 cups of vinegar, a scoop of oxygen bleach, or up to 1 cup of chlorine bleach. Select the tub-clean or self-clean cycle if your machine has one, otherwise the hottest and longest normal cycle. Heat is critical: aim for a wash above 130°F to kill mold effectively.
Step 5: Wipe Down and Second Rinse
After the cycle, wipe the drum, glass, and gasket dry with a clean cloth. If you used bleach or a strong chemical, run one more rinse cycle before your next load of laundry to flush out any residue.
How to Stop Washing Machine Mold From Coming Back
Killing the mold is temporary if you leave the same damp, closed conditions in place. Mold needs moisture, and your washer keeps handing it out. Break the cycle with these habits:
- Leave the door and dispenser drawer open between washes so the drum can air out and dry.
- Wipe the gasket dry after your last load of the day, especially the bottom fold where water pools.
- Use less detergent, and use HE detergent in HE machines. Excess soap leaves residue that feeds mold.
- Skip or reduce liquid fabric softener, which leaves a sticky film mold loves.
- Run a hot tub-clean cycle monthly with Affresh, vinegar, or oxygen bleach.
- Move wet laundry to the dryer promptly instead of letting it sit in the drum for hours.
- Improve laundry-room ventilation and keep humidity down, ideally below 50 percent.
Important Safety Note
Remember that cleaning a washer removes surface mold and mildew, but it is not the same as fixing a whole-room problem. If you find mold spreading beyond the machine onto walls, flooring, or into a musty laundry closet, the underlying issue is moisture and ventilation. Cleaning the drum will not solve that. A large infestation, mold larger than about 10 square feet, or mold that keeps returning after repeated cleanings warrants professional remediation and a look at your room’s moisture source. And never simply paint over mold on a laundry-room wall, because paint only hides it and it will bleed back through.
Frequently Asked Questions
What is the single best mold remover for a washing machine?
For routine maintenance, Affresh tablets are the easiest and are manufacturer-approved. For a heavy existing problem with visible staining, a spot treatment like RMR-86 on the gasket plus a hot vinegar or oxygen-bleach tub-clean cycle is the most effective combination.
Can I use vinegar and baking soda together?
Yes. Vinegar and baking soda are safe to combine and work well together on a washer. Use a baking soda paste to scrub the gasket, then run vinegar through a hot cycle. Just never combine vinegar with bleach.
How often should I clean my washing machine?
Run a tub-clean cycle once a month. If you already have a mold problem or live in a humid climate, every two weeks until the smell is gone, then monthly for maintenance.
Why does my front-loader smell even after cleaning?
Usually because the gasket, dispenser drawer, or drain filter still holds hidden mold and residue. Clean all three, leave the door open to dry between washes, and cut back on detergent and fabric softener.
The Bottom Line
The best mold remover for a washing machine depends on the severity: Affresh tablets and white vinegar for routine cleaning, RMR-86 or chlorine bleach for stubborn stains, and oxygen bleach as a gentle middle ground. Whatever product you choose, the winning routine is the same: scrub the gasket and dispenser by hand, run a hot tub-clean cycle above 130°F, rinse, and then keep the door open to dry between loads. Stay on top of moisture and detergent habits, and the musty smell stays gone for good.
