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How to Clean a Washing Machine Gasket

Home/Resources/Cleaning & Laundry/Cleaning a Washing Machine Gasket
DH
Written & researched by Derek Holt Home & Appliances Editor
Updated August 2026
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Cleaning a washing machine gasket is a quick DIY job of 15 to 20 minutes, using a cloth and a cleaner you already have, and it is the single most effective fix for a musty front loader. No permit or pro is involved. The rubber door seal is built to hold water in, so it traps residue and moisture and grows the mold behind that smell. The task is to peel back the folds, clean out the gunk, and then adopt the dry-out habits that stop it returning.

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Step-by-step: clean the door boot

  1. Open and inspect. Open the door and gently peel back the rubber gasket to expose the hidden folds where water and gunk collect.
  2. Remove debris. Wipe out trapped water, lint, hair, coins and slime with a cloth or paper towels, checking the lowest point where water pools.
  3. Apply cleaner. Spray or wipe the moldy areas with a mold-and-mildew cleaner or diluted white vinegar, letting it dwell a few minutes to loosen the staining.
  4. Scrub the folds. Work the folds with a cloth or soft brush, reaching into the creases. For stubborn black stains on white rubber, a baking soda paste or diluted bleach helps.
  5. Wipe dry. Wipe all surfaces of the gasket dry so no cleaner or moisture sits in the rubber.
  6. Clean the dispenser too. Pull and rinse the detergent drawer, since it grows the same biofilm and feeds the smell.
  7. Run a hot tub-clean cycle. Run the machine's tub-clean or hottest empty cycle to flush the drum and drain.
  8. Leave it open to dry. Prop the door and dispenser open so the seal dries fully between washes.
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Tools and materials

You need a mold cleaner or white vinegar, cloths or paper towels, a soft brush, baking soda and gloves. A clean gasket is one part of fresh laundry, and the detergent you use matters too, since overdosing HE detergent feeds the very biofilm you just removed, which is why our laundry detergent picks are worth pairing with this. For the wider machine and the laundry room, follow through with the full washer clean and the floor care in our steam mop roundup.

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Mistakes that let mold return

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Notes and safety

This is low-risk DIY. The cautions are to ventilate and wear gloves with mold cleaner or bleach, never mix bleach with vinegar or other cleaners, and wipe bleach off the rubber afterward since prolonged contact can degrade the seal. There is no code or permit involved. If the gasket is torn, cracked or leaking, that is a replacement part rather than a cleaning job, and a persistently soaked machine that will not drain points to a separate mechanical issue.

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More from this hub: Cleaning & Laundry · Clean a washing machine · Clean a dryer vent · Remove hard water stains · Best laundry detergent · How we rank

Straight Answers

Frequently Asked

Why does my front load washer gasket get moldy?

The rubber door boot on a front loader is designed to seal water in, so water, detergent residue and lint collect in its folds and stay damp between washes, which is exactly what mold and mildew need to grow. Front loaders use little water and often cold cycles, so they never get hot enough to kill the biofilm, and a closed door after washing traps the moisture. The mold shows as black or gray spots in the seal and produces the musty smell. Cleaning the folds and leaving the door open to dry breaks the cycle.

How do you clean mold off a washing machine gasket?

Peel back the rubber gasket to expose the hidden folds, wipe out the trapped water, lint and gunk, then spray or wipe the mold with a mold-and-mildew cleaner or a solution of diluted white vinegar, letting it dwell a few minutes before scrubbing with a cloth or soft brush. For stubborn black staining, a paste of baking soda or a diluted bleach solution on white rubber can help, but never mix bleach with vinegar. Wipe dry afterward, and run a hot tub-clean cycle to flush the drum.

Can you use bleach on a washing machine gasket?

You can use a diluted bleach solution on a stubborn moldy gasket, and it is effective at killing and lightening mold stains, but use it carefully: never mix it with vinegar or other cleaners, ventilate the room, wear gloves, and wipe the rubber dry afterward since sitting bleach can degrade the seal over time. Many people get good results with white vinegar or a dedicated mold cleaner first and reserve bleach for heavy staining. Whichever you use, the real fix is drying the seal and leaving the door open so mold cannot return.

How do you stop a washing machine gasket from getting moldy again?

Leave the washer door and detergent drawer open after every wash so the seal dries out, wipe the gasket dry after washes if it stays wet, use the correct amount of HE detergent since excess feeds biofilm, and run a hot tub-clean or self-clean cycle monthly. Avoid always washing cold, an occasional hot wash helps. Also check that laundry is not left sitting damp in the drum. These small habits keep the seal dry between uses, which is the single thing that prevents mold, since mold cannot grow without persistent moisture.

Is a moldy washer gasket dangerous?

The musty smell and visible mold are mainly a hygiene and odor problem, transferring smells to clothes and, for people sensitive to mold, potentially irritating. It is not usually a structural danger to the machine, though heavy neglected buildup can eventually affect the seal and drainage. The practical concern is that clothes come out smelling worse than when they went in. Cleaning the gasket and adopting the dry-out habits resolves both the smell and the appearance, and keeps a small maintenance issue from becoming a persistent one.