It is recommended to clean or replace your filters every 3-6 months depending on use. This filter is washable clean by hand washing in warm water. A mild detergent may be used if desired. Allow the filter to air dry completely before replacing. It's a good idea to buy an extra filter to always have a dry one ready to use. Did you know that your vacuum, has filters that should be checked frequently. Depending on your household, your friends at Bissell recommend cleaning or replacing your filters frequently and more often if you have pets that shed and family/friends that track in dirt and debris. Refer to your Bissell vacuum owner's manual for replacement instructions.