How to clean your K&N air filter 🧼 Step 1: Remove the Filter Take the filter out carefully and tap off loose dirt. Step 2: Apply Cleaner Spray both sides with K&N Power Kleen and let sit for 10 minutes (don’t let it dry on the filter). Step 3: Rinse with Water Rinse from the clean side out using low-pressure, cool water until dirt is gone. Step 4: Let It Dry Gently shake off water and let the filter air dry completely. Do not use heat. Step 5: Re-Oil the Filter Apply K&N filter oil evenly along