A:Answer The air filter behind the front grille should be checked and cleaned at least every 30 days or more often if necessary. Clean the filter with warm, soapy water. Rinse and let the filter dry before replacing it. Do not clean the filter in a dishwasher. For full details, see page 8 of the Owner’s Manual, which can be viewed at the bottom of the Features tab on the product page of the Best Buy website. Lauren@GEAppliances