Front load washers have a rubber seal around the inside of the door. This seal allows the washing machine to close tightly so no water escapes from the washer. Sometimes the excess moisture and darkness that naturally occurs inside washing machines are a breeding ground for fungus, such as mould and mildew. The fungus living on the rubber seal can spread to other areas -- via spores -- as well as create a musty odour inside the washer that can transfer to clothing.
Set the washing machine on the hottest water temperature. Allow the washer drum to begin to fill with water.
Add 2 cups of white vinegar into the water. Alternatively, add 1 cup of bleach. Close the washing machine lid and allow it to complete a cycle.
Fill a spray bottle with white vinegar. Alternatively, fill the spray bottle with equal parts water and bleach.
Open the washer door. Liberally apply the vinegar to the rubber seal. Make sure to get the vinegar into the crevices between the washer and the rubber seal. Wipe the outside of the seal with a damp cloth.
Repeat the process twice a month to keep fungus at bay.
Keep the washer door open when not in use to prevent mould and mildew growth inside the washer.