Mouldy Washing Machine Gasket? How to Prevent and Clean It!

Mouldy Washing Machine Gasket? How to Prevent and Clean It!

Written for PRS Appliances

A clean washing machine should smell fresh and operate efficiently—but if you’ve noticed a musty odor or black spots around the door seal of your front-load washer, you’re likely dealing with mold buildup in the gasket. This common issue doesn’t just affect performance—it can impact your health and your laundry.

Here’s everything you need to know about why this happens, how to prevent it, and how to clean it.

Why Does Mold Grow on the Gasket?

Front-load washers are designed with a rubber gasket (or seal) around the door to prevent water leaks. Unfortunately, that area also traps moisture and detergent residue, creating the perfect breeding ground for mold and mildew. Over time, it can start to smell, stain your clothes, and even degrade the rubber.

Signs of Mold in Your Washer Gasket

  • A musty or sour smell when you open the door

  • Visible black or gray spots on the rubber seal

  • Residue buildup around the gasket folds

  • Clothes that come out smelling “off”

How to Clean a Mouldy Washing Machine Gasket

1. Gather Your Supplies:

  • White vinegar or hydrogen peroxide

  • Baking soda (optional)

  • Old toothbrush or soft scrubbing brush

  • Microfiber cloth or paper towels

  • Rubber gloves

2. Wipe the Gasket:
Open the washer door and pull back the gasket folds. Use a cloth soaked in vinegar or peroxide to wipe away visible mold and grime.

3. Scrub the Area:
For stubborn spots, apply vinegar or peroxide directly to the moldy area, sprinkle baking soda on top (optional), and scrub gently with a brush.

4. Rinse and Dry:
Wipe the gasket clean with a damp cloth to remove any residue. Then dry thoroughly with a towel to prevent new mold from forming.

5. Run a Cleaning Cycle:
Run your washer on the hottest setting with two cups of vinegar (no clothes inside) to flush out remaining bacteria. Some models have a specific “tub clean” cycle.

Prevention Tips: Keep Mold from Coming Back

  • Leave the door open after each wash to allow air to circulate.

  • Dry the gasket regularly with a towel, especially after large or damp loads.

  • Use HE detergent sparingly to avoid buildup.

  • Wipe out the gasket once a week with a vinegar-dampened cloth.

  • Run a monthly cleaning cycle with washer cleaner or vinegar.

When to Replace the Gasket

If the mold has caused cracks, tears, or deep discoloration that can’t be cleaned, it may be time to replace the gasket. A worn-out gasket can cause leaks or harbor bacteria that no amount of cleaning will fix.

Visit PRS Appliances for expert advice and professional service if your machine needs parts or a replacement gasket.

Stay Mold-Free and Fresh
Keeping your washing machine gasket clean doesn’t take much effort—but it makes a big difference in performance, hygiene, and peace of mind.

Need help or parts for your washer? Visit PRS Appliances today for expert advice and service with the spirit of aloha.

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