Top Reasons Your Wash Machine Rubber Seal is Mouldy — And How to Fix It

If you’ve noticed unpleasant odours or black spots around your wash machine rubber seal, you’re not alone. Mould build-up is a common problem in UK households, often leading to hygiene concerns and potential damage to clothing.

In this blog, we’ll explore why mould develops on your wash machine rubber seal and, more importantly, how you can clean it effectively—and prevent it from returning.

Why Does Mould Form on a Wash Machine Rubber Seal?

Your wash machine rubber seal plays a key role in keeping water inside the drum during cycles. However, its design can also trap moisture, detergent residues, and dirt—creating the perfect breeding ground for mould and mildew.

Here are the main reasons mould appears:

1. Frequent Low-Temperature Washes

Modern washing habits often favour eco-friendly, low-temperature washes. While good for energy bills, they don’t kill bacteria and mould spores effectively.

2. Detergent and Fabric Softener Build-Up

Excessive use of detergent or fabric softener can leave a sticky residue on the wash machine rubber seal, feeding mould growth.

3. Leaving the Door Closed After Washing

A closed washing machine door traps moisture inside, allowing mould to thrive in the damp environment.

4. Infrequent Cleaning

Many people forget that washing machines need cleaning too! Neglecting regular maintenance leads to mould build-up over time.

How to Clean a Mouldy Wash Machine Rubber Seal

If your wash machine rubber seal is already showing signs of mould, don’t worry—it can often be cleaned with a few simple steps.

Step-by-Step Cleaning Guide:

  1. Gather Your Supplies:
    • White vinegar or baking soda
    • Mild detergent
    • A soft cloth or sponge
    • An old toothbrush for hard-to-reach areas
    • Gloves
  2. Wipe Down the Seal: Open the door and gently pull back the wash machine rubber seal to reveal hidden mould patches. Wipe away loose debris.
  3. Apply Cleaning Solution: Use a mixture of white vinegar and water, or baking soda paste, to scrub affected areas. The toothbrush helps get into creases.
  4. Run a Hot Wash Cycle: After scrubbing, run an empty hot wash (90°C if possible) to rinse away remaining mould and residues.
  5. Dry Thoroughly: Leave the door open after cleaning to allow full drying.

If mould persists despite cleaning, it may be time to consider a replacement. For durable sealing solutions, explore our rubber strips collection.

How to Prevent Mould on Your Wash Machine Rubber Seal

Prevention is always better than cure. Here’s how to keep your wash machine rubber seal mould-free:

  • Leave the Door Ajar: After every wash, let air circulate to dry out moisture.
  • Use the Right Amount of Detergent: Avoid overloading with soaps and softeners.
  • Run a Monthly Hot Wash: This helps kill bacteria and flush out residues.
  • Regularly Wipe the Seal: A quick wipe-down after washing prevents build-up.
  • Use Specialist Cleaners: Occasionally use washing machine cleaners designed to combat mould.

When Should You Replace Your Wash Machine Rubber Seal?

If the mould has deeply embedded into the rubber, or if the seal is cracked or damaged, cleaning may not be enough. A compromised wash machine rubber seal can lead to leaks and ongoing hygiene issues.

Replacing the seal restores efficiency and cleanliness. You can find high-quality rubber sealing options on our rubber strips page.

A mouldy wash machine rubber seal doesn’t just look unpleasant—it can affect your machine’s performance and the freshness of your laundry. Regular cleaning and simple preventative measures can keep mould at bay.

If cleaning isn’t solving the problem, don’t hesitate to replace the seal to ensure your washing machine stays in top condition.

Looking for a reliable wash machine rubber seal replacement?
Visit our rubber strips collection or contact us for expert advice!
📞 Phone: 01903 732088
📧 Email: sales@silcoproducts.co.uk

Frequently Asked Questions (FAQs)

Q1: Is mould on a wash machine rubber seal dangerous?
A1: While not immediately harmful, mould can cause unpleasant smells and may trigger allergies. It’s best to clean it promptly to maintain hygiene.

Q2: How often should I clean my wash machine rubber seal?
A2: Ideally, wipe down the seal weekly and run a hot wash monthly to prevent mould build-up.

Q3: Can I replace a wash machine rubber seal myself?
A3: Yes, with basic tools and some patience, many homeowners can replace the seal themselves. However, if unsure, professional installation is recommended.