I built a cold smoker recently hoping to eventually make some bacon. It consists of two plywood boxes with a 4" dryer hose between them. I'm using a soldering iron and a small cast iron skillet to ignite both hickory and applewood chips. It seems I'm getting plenty of smoke but after 2 to 3 hours everything smells and tastes like an ashtray. All I've tried so far is some cheddar cheese and some almonds. What am I doing wrong? Thanks, Steve