K&N Power Kleen Air Filter Cleaner & Degreaser K&N Power Kleen Air Filter Cleaner & Degreaser is designed specifically to clean K&N cotton air filters. It efficiently breaks down grease, dirt build-up, and old filter oil, allowing for simple rinsing with water. Beyond air filters, its effectiveness as an industrial strength degreaser makes it a versatile cleaning solution. Features: Completely biodegradable Safe on paint, chrome, aluminum, plastic, rubber and vinyl