MarkFixNote
Stuck-on foodSimmer water to deglaze, then non-scratch padMost of it comes right up
Rainbow / white spotsWipe with white vinegarHarmless heat tint / mineral spots
Burnt-on greaseBaking-soda paste or oxalic cleanserRub with the grain, rinse well
AvoidSteel wool, chlorine bleachThey scratch or pit stainless