Apply Air Filter Cleaner on complete filter surface (inner/outer) and let sit for 1 to 3 minutes. If possible massage filter to loosen stubborn dirt and sand. Rinse clean with water in a safe container or drain. If stubborn areas remain, reapply product and repeat.
CAUTION: May cause some painted surfaces to discolor. Do not use on plastic or Lexan® windshields.
California Residents: Proposition 65 warning