I'm getting a rainbow discolorization inside my all-clad and calphalon triply over the hot spots where the burners (electric) contact. I'm not going above medium-high heat. Is this normal/regular? Do I need to use a differant cleaner besides dishsoap? Should I stop being fussy?
Hey there...I've had the same thing happen in my Calphalon SS and All-Clad....as other's have said, Barkeeper's Friend does miracles to get rid of the rainbow. Anyway, I noticed you had an electic stove. So do I, and I believe it has caused the problem. I bought an infrared thermometer to measure the surface temperature of my pans after reading the Alton book. I found that my electric stove on Medium made my pans reach close to 575 degrees! I now use Medium as High and adjust down as called for, so Medium Low is my regular temperature used. No more rainbow patina and I don't have to worry so much about inadvertent burning of food :-).