We have the regular 8” All Clad sauté pan and the 10” All Clad polished fry pan which clean up no matter what we do to them. If dish soap doesn’t completely a little elbow grease and Barkeepers Friend cleans them like new. NOT the 8” copper core! Nothing will take the burned on cooking oil off of it! We’re talking Barkeepers Helper and 1/2hr scrubbing and it still looks awful. Our feeling is to skip the copper core and get the regular fry pans.