Hi guys, now I know the cause of the problem, what I am hoping to learn is what can be done about it. Me and my buddy build a reverse flow smoker. We made it out of 100 percent steel. The first smoke I did on it was four racks of Baby back ribs, they came out great. Today, I decided to try a beef brisket.. after it had smoked for about 4 hours, I tried to open the lid to check and see if the brisket needed a spritz of moisture and discovered that I could not open the lid. I have a four prob thermometer that I use when I smoke, one on the left, one in the center, one on the right, and the other in the brisket its self. I was able to freely move the prob wires under the front edge of the smoker so I think the problem is on the sides. Obviously it is due to the steel expanding with heat. But considering we have already built the smoker, what can I do to fix this problem?