This K&N Power Kleen Filter Cleaner is the only approved cleaner for K&N cotton filters when performing a re-oiling procedure. Available in both a 355mL pump bottle and a 710mL spray bottle this heavy duty degreaser easily cleans old filter oil, dust, dirt and debris from the cotton media pleats without damage. K&N Power Kleen Air Filter Cleaner can also be used as a general purpose cleaner on painted surfaces, chrome, plastic and more without worry. After cleaning your K&N air filter with Power Kleen, simply flush the filter with water and leave to dry. Once dry, you can begin the re-oiling procedure.