Here's my opinion (and that's all it is.) I have a small leak abound the door-very small. I adjust the flue on my stack to where there is just a small amount coming out around the door. It's minimal. But i figure that if there is no smoke coming out around the door, then it's obviously pulling in cooler air, which is lowering the temp in my box. I use the flue to create just the slightest positive pressure on the smoker to where there is just barely visible smoke coming out around the door (almost none). Works for me, but obviously there are many kinds of smokers and smokees', i guess you just do what works for you. I would say that if it bothers you , fix it how ever you want it. That's the cool thing about smoking meat. Rarely any two people use the exact same method, but the end result is usually pretty darn tasty.