I was cooking pizza at 650 degrees yesterday and heard a pop. This pop didn't sound like anything I had heard before. Today, after it cooled, I inspected the egg and saw a hairline fracture in the fire ring (all the way through). Question is, is this fairly common or something I should have replaced? If some of you say "mine has been that way for a couple years" I wont worry about it. If not I will contact the dealer. While I am at it, I was wanting some feedback on moving an egg in a nest while it is still hot is it good,bad or indifferent??