The gap is most likely warping because they cut the lid too fast, generally the correct way to do it to cut most of the door but not the corners, let it cool completely then finish the corners out. Really helps to avoid the warping of that metal that will cause the door to not seal perfect. Not saying they cut corners, but going off the pure volume of pits they're building I'd bet they don't have time for this step. If you have a heavy at least 2lb hammer you might be able to beat that portion of the door down more. Although you won't get quite the effect you would if you take the door actually off and lay it flat on a table. I know this because I learned the hard way on smoker doors, and spent about a half day working and beating the doors to get a right seal on my first smoker.


The second none handy version is go on Lonestar grillz website and order some of his smoker door insulation. It's a stainless mesh with a membrane inside of it that will flatten out and it really seals their doors up tight. That may help. I believe you might be able to glue it on possibly.