This is not related to food preserving, but thought I'd give this a shot anyway. I have a good pot and lid that unfortunately has been ruined due to burned on food. I've tried several methods already to remove the burned on food such as soaking the pot and lid in hot, soapy water, soaking in vinegar and baking soda, stainless steel scrubbers, brillo pads - all to no avail. Any recommendations?