happy new year everyone,
so, i'm buying new cookware lately, switching to stainless from aluminum. i bought a cuisenart pan with the triply base, boiled some potatoes on medium to high heat to make mashed potatoes. after i'm done, i have dark grey spots that i cant remove with anything, bkf and plastic scrub pads. then i went and got a calphalon triply pan, again it left white marks on the bottom that i cant remove after trying to make pasta. am i setting the heat too high? how can i boil water without ruining a pan? should i try to find a cast iron sauce pan for making these types of foods?
thank you for all of your time