My first few smokes in the gen 1 (control panel on the back of the top) mes 30 went fine, but today I notice a foul smell coming out of the back of the unit. It's somewhat like a melting plastic. Inside of the unit still smells only of wood smoke, so I I'm guessing some part of the smoker itself overheated or is malfunctioning. I do see thin wisps of smoke coming directly out of the back, along the edge of where the silver metal backing lines up with the black metal sides, so I'm pretty confident that it is not emanating from the smoking chamber. Anyone ever heard of this before? It looks like the back is not user accessible, but there is a small hatch on the back with 6 screws on it. After this current smoking is done and it cools down I'll try to peer in there (assuming the thing doesn't ignite and burn to the ground today ).