Why Washing Machine Door Seals Go Mouldy & How to Fix It

Is your washing machine door seal covered in black mould? A mouldy door seal can cause bad smells, stains on your laundry, and even damage the machine over time. If you’re dealing with this issue, don’t worry – here’s how to prevent and remove mould effectively.

Why Does Mould Grow on Washing Machine Door Seals?

Mould thrives in damp, warm environments – making your washing machine door seal the perfect breeding ground. Here are the main causes:

• Trapped moisture: Rubber door seals hold water after a wash, especially in front-loading machines.
• Detergent & fabric softener buildup: Residue from liquid detergents and softeners provides food for mould.
• Low-temperature washes: Frequent cool washes (30°C or below) don’t kill bacteria or mould spores.
• Leaving the door closed: A closed washing machine door traps humidity, creating the perfect conditions for mould growth.

How to Prevent Mould on a Washing Machine Door Seal

Stopping mould before it starts is the best solution. Follow these simple steps to keep your washing machine fresh:

1. Leave the Door Open After Every Wash

Allowing air to circulate helps the drum and rubber seal dry out, preventing mould growth.

2. Wipe the Seal Regularly

Use a dry cloth or kitchen towel to remove excess moisture after each wash.

3. Use the Right Detergent

Switch to powder detergent and avoid excessive fabric softener, which can cause buildup.

4. Run a Monthly Hot Wash

Set your machine to 90°C with no laundry inside to kill bacteria and mould spores.

5. Clean the Detergent Drawer

Remove the detergent drawer and scrub away any mould or residue with an old toothbrush.

How to Remove Mould from a Washing Machine Door Seal

If your washing machine door seal is already mouldy, follow this step-by-step guide to clean it effectively:

1. Use White Vinegar or Baking Soda

Mix one part white vinegar with one part water and apply it to the mouldy seal. Scrub with a toothbrush.

2. Try a Specialist Washing Machine Cleaner

Products like washing machine descaler or mould remover work well for stubborn stains.

3. Run a Hot Wash with Bleach

For severe mould, add a small amount of bleach to the detergent drawer and run an empty hot wash.

4. Replace the Seal if Necessary

If the mould won’t come off, it may be time to replace the washing machine door seal.

Need Help? Book a Professional Washing Machine Repair

If your washing machine has persistent mould problems or isn’t working properly, a professional repair service can help get it back in top condition.