How to Prevent Mould in Your Washing Machine
Mould and musty smells in washing machines are extremely common — and entirely preventable. The root cause is almost always moisture trapped in the drum or door seal after washing. Here's how to prevent mould before it starts and how to deal with it if it's already there.
Why Does Mould Grow in Washing Machines?
Front-load washing machines are particularly susceptible to mould because:
- The rubber door gasket (seal) traps water, lint and detergent residue after washing
- When the door is closed, the trapped moisture creates a warm, dark, humid environment — perfect for mould and mildew
- Low-temperature washes and liquid detergent don't kill bacteria and mould spores as effectively as hotter washes with powder
- Excess detergent leaves residue in the drum and dispenser that feeds mould growth
How to Prevent Mould: 5 Simple Habits
1. Leave the Door Ajar After Every Wash
This is the single most effective prevention measure. After removing your laundry, leave the door slightly open for 1–2 hours to allow the drum and door seal to air out. Even a 2cm gap makes a significant difference to airflow. If you have children or pets, leave the door open but check periodically.
2. Wipe the Door Seal After Every Wash
Using a dry cloth or paper towel, wipe around the rubber door gasket after every wash — especially in the fold at the bottom where water pools. This takes 10 seconds and prevents the main mould breeding ground from staying wet.
3. Remove Laundry Promptly
Don't leave wet laundry sitting in the drum. The warm, damp environment accelerates mould growth on the drum walls and door seal. Remove laundry as soon as the cycle finishes if possible.
4. Use the Right Amount of Detergent
Excess detergent creates residue that feeds mould. Use the amount specified on the packaging — or less. For modern HE (High Efficiency) front-loaders, far less detergent is needed than for older machines. Using powder detergent instead of liquid also reduces residue build-up.
5. Run a Hot Maintenance Wash Monthly
Once a month, run an empty drum on the hottest available cycle (usually 60–90°C) with either a dedicated washing machine cleaner tablet or a cup of white vinegar added to the drum. This kills bacteria and mould spores and removes residue build-up. Many modern machines have a dedicated 'drum clean' or 'tub clean' cycle for this purpose.
How to Remove Existing Mould
If you already have mould in your washing machine:
- Mix equal parts white vinegar and water in a spray bottle
- Spray thoroughly into the door seal folds and inside the drum
- Leave for 30 minutes
- Scrub the seal with an old toothbrush
- Wipe clean with a damp cloth
- Run a hot empty wash with a washing machine cleaner
For severe mould, repeat this process several times. If mould has penetrated deep into the rubber seal, the gasket may need replacement — contact a service technician.
Drawer and Dispenser Cleaning
Remove the detergent drawer completely every month and rinse under hot water. Mould frequently grows in the drawer housing. A toothbrush cleans the inside of the housing.
Oceania Appliances: Quality Washing Machines for Sydney Homes
We carry a range of front-load and top-load washing machines from LG, Samsung, Electrolux, Fisher & Paykel and others as ex-display and graded stock. Free delivery across Sydney. Contact us to find out what's available today.