玻璃損毀了...........怎麼辦?

Try to cut a fresh lemon in half and wipe it couple times, if it helps, continue to do so.
I did some experiment on this kind of burned stain, and lemon prove to be working.
if lemon won't work for you, try some TOOTH PASTE, the one with peroxide is the best and try to use a clean cloth and keep on rubbing it until it goes away.
alien