Salt Is Safe for Only Some Surfaces
I use this cleaning trick most often on my enameled cast iron Dutch ovens and my cast iron skillets, but it also works for ceramic or glass baking dishes. Refrain from using it on aluminum, stainless steel, or on pans with a nonstick coating. Salt can scratch aluminum pans and nonstick surfaces, and can cause pitting and rust on stainless steel.
The Easiest Way To Clean Stuck-on Food From Pots and Pans