I recently inherited a well used Toastmaster waffle iron. It works OK, but the reddish-brown ceramic plates (that are removable/reversible and have a waffle iron on one side and a flat grilling surface on the other) have a blue-ish white discoloration over them.
At first I thought this was some type of mold. After running the plates thru the dishwasher and then scrubbing them with a brush, the areas of discoloration remained.
Does anyone know what might have caused this? Is it safe to use the waffle iron in this condition?