I was using the steamer insert in the 4 qt pan tonight to make green beans and lost track of time. All the water boiled off and I don't know how long it was cooking without water. The beans tasted burnt and there was a black coating on the bottom of the pan that almost looked bubbled on the sides. I did soak it and rinse it out a few times and it looks pretty normal - just soaking it some more to get the last bit off the bottom edges. Has anyone else done this? Could I have ruined the pan? I'd be so upset if it was destroyed. Just wondering if anyone could share their wisdom on this. Thanks! I have to say that if it isn't ruined - one more reason to really love this cookware!