Doc wrote:
I have a teflon pan that was left on the stove with water in it, set
at high to boil it and left it too long, the water boiled out and now
the bottom area of the teflon is kind of a smooth chalky gray, doesn't
feel anything like the rest of the teflon.

Anything that can be done with it or is it trashed?


Wash it out and continue to use it if you want. Finish may not work as
well but there is no health hazard. You cannot restore the finish.
Hazard of overheating teflon will cause flu like symptoms to you but
maybe kill your canaries, whatever, as birds have higher respiratory
requirements. Same thing could happen to birds in all metal pan burning
food.