Do you guys know how to get a bend out of the bottom of a pan? I have a pan that i assume someone put cold water in while it was hot. The pan is usable but it doesn't sit flat. It is an old griswold with a heat ring. I was thinking maybe a rubber mallet or maybe set up some clamps(it would probably take a lot). I got the pan hot and put cold water on the bottom/underside of the pan, it didn't do anything or perhaps the pan wasn't hot enough.