I have several copper pans which I use daily. I don’t have the time to always clean them. Now they have a thick crust of black burned fat. When I wash it with dish soda, nothing changes. And I don’t want to use abrasive mechanics (steel sponge), because I am afraid this will scratch the copper surface.
Is there a chemical trick to dissolve the black crust? What is that black crust chemically and why is it so strong?