so i have a problem so i guess ill put it here being the oh so smart person i am, i brought my camera lens(18-55 kit) and d40 on a bike and ended up dropping it in a pile of dirt. everything seems to be working well except my lens. its zoom twist has gotten stuck and the lens no longer auto focuses (the af motor is in the lens). any one know a way to clean out the lens or something to maybe fix these problems? or is it pretty much finished? thanks for any imput.