I'm at my wit's end here. First off let me say I cook with a glass top and all the pans I mention are Stainless Steel. I've never poured cold water in a hot pan and I preheat my pan on, "4" (goes to "9") with a couple tbsp of canola. Everything I get starts to warp after a single use. I had a Cuisinart MCP-12 set and the warping started after one use and just got worse and worse. So I exchanged it for another set and the same thing happened. So I figured it must be these pans. So get an All Clad 12 inch fry pan to see what all the fuss is about. And after just browning some ground-chicken it is already bowed slightly from the outside in. If you look at the profile of the pan with the handle directly at you, the sides are slightly raised up like a, "V" shape. So do exchange another pan again at Amazon? What am I doing wrong? I am extremely OCD about this stuff and I follow care-instructions to the, "T". My buddy at work has All Clad/glass top and he says he uses them at full bore heat!