When I got my smoker I asked guy in my campground for help he was the resident expert. He told me to keep the rain cap on the chimney closed. There was enough air leaks anyway. That turned out really f*****g good After learning what I have learned here, I must say I am damn good at this stuff. All of the credit goes to you. To everyone who ask the question even If It been asked several times before and to everyone who keeps answering the same questions over and over again. Thank you!!!!