Getting ready to cook ribs today and decided to clean out the egg first. I've noticed that the fire box wobbled a good bit. When I took the egg apart I found a lot of ash behind the fire box. I cleaned it out good and put it back together but the inside still wobbles. The egg itself is real stable, just the fire box. I also noticed that there was a good 3/4 of an inch between the fire box and the wall of the egg all the way around. Is that normal? Does your fire box wobble?