Buddy Heater got a little wet in a rain storm the other day ice fishing. Pilot would not light after this outing. Did a little research on this wonderful forum and found some guys taking canned air spray and rubbing alcohol and cleaning out their pilots and lines. I did that exact thing and also sprayed out the clay stone and WOW what a difference that made. The flame coming out of the pilot is bigger than ever before and the stone got hotter than before as well. Even if your heater is working I suggest trying this to get maximum efficiency out of those little heaters.