Moved My cold smoker up to hedge row. Been down by garage, where it was built. Old OK Joe grill. Took legs off,set up on rocks and leveled, aluminum duct work. Got smoke going, and humidity was high, misty and all. Wanted to draft at first then just back drafted. hard time keeping smoke rolling out back of smoker. Smoke would not hardly go above second hinge on right.Lowered Bacon to get the smoke. Raised duct to let flow and worked for awhile See smoke rolling out of fire chamber. Natural resources. This is what I mean flowing out the back. Bacon in chamber. So the next deal is after the heavy air left, it drafted right. It did it right away next night. My solution is to bury fire chamber to get draft running up hill, which thought it was, Fire box is downhill. Vent is higher on fire chamber than inlet on smoke chamber. Think heavy air makes a difference? What do you th ink?