i am a newbie to BGE. have made several fabulous meals, including baking a great loaf of bread. i have noticed that the lid doesn't not uniformly rest on the base. In the back there is about a 1/8 to 1/4 inch gap, but it rests firmly in front. The gasket is getting burned in the back. I have fiddled with adjusting the metal bands and I can get it to adjust so it is flat all around, but as soon as I retighten and lift the lid the it goes back to this higher in back formation. Is it is problem--and if yes as I suspect--any suggestion on what I am doing wrong and how to fix it?

Thanks!