Take a spray bottle with warm water, then pour in detergent and white vinegar at a ratio of 2:1, then pour a small amount of baking soda; mix well and then sprayed on the filter, let it sit for 3 minutes; finally scrubbed with a hundred clean cloth can be. Ingredients:1 mask, 1 spoon salt, 2 spoons detergent, 1 spoon baking soda, appropriate amount of white vinegar, 1 bowl of water.