Plastic coffee filter baskets are quite handy to have around. From not having to buy coffee filters anymore to knowing you are doing something positive for the environment, the filters are a great asset to your kitchen. If you drink a lot of coffee and don't have time to clean the filter regularly, you may notice that it's changed colors a bit. Coffee leaves behind an ugly stain over time. Fortunately no matter how bad the stain is, it won't take long to remove.
Rinse the filter basket out well to get rid of any leftover coffee grounds.
Fill the sink with hot water and add 2 cups of white vinegar per gallon of hot water.
Set the basket in the sink and leave it to soak for at least 15 minutes.
Wash the filter with warm, soapy water and a clean cloth or sponge.
Repeat the process for particularly stubborn stains.