I use the NO-TOIL. It comes with oil,cleaner, and sealant. I swear by it. It makes cleaning your air filter extremely easy and clean. All you have to do is soak it in warm water and the cleaner and within a half an hour, you have a brad new looking air filter. The oil is real tacky so you dont have to worry about dirt getting thrue. It comes in a kit for about $15. Its all bio-degradable also. I highly recommend it. TIP: always use an aerosol (its a lot easier and less mess)