Clean Dryer Filter Lint builds up, so to remove it, take the filter out and wash with soap and water. Use the upholstery attachment to get rid of any lint from the filter slot. Fabric softener may create a buildup and too much lint can cause fires. My Husband is on the fire department and they are passing the word right now that clean dryer filters are very important. We had a apartment buliding burn down a couple months ago. Be careful