- Black oiled cotton gauze high performance filter media - Chrome nose; with ''Arlen Ness'' embossed - Direct replacement for all Monster Sucker air cleaner assemblies - Cotton style air filter cleaning? 1) Remove filter element & lightly tap off loose dirt and debris. 2) Liberally spray filter cleaner on in & outside of filter & wait for 10 minutes. 3) Rinse filter with low pressure water from the (clean) inside to the outside to flush dirt out. 4) Shake off water and let dry naturally. Do not use compressed air or heat to dry. 5) Apply oil evenly on the entire filter & reinstall.