Well i still got my stock air filter, and i clean it once a week.
All i do is get a buckett of hot ass water put soap in it,
Take the filter off of the banshee and put it in the water and soak it, scrub the crap out of it.
Then take it out take a water hose and make sure all the soap is out of it.
Put it back on and its all good to go.
Im buying a k&N kit next week. R they really that much better.