You have more posts than me, and I don't want to start shit, but DO NOT DO THIS. Cooking plastic in the oven, especially cellophane? Just lack of common sense. I don't care if a doctor told you it was safe, no doctor knows what is in that shit, or what happens to it under your specific conditions. I really hope no one did this on your advice. I understand you are wetting it down, but that is no fail safe. Something like a high quality tin foil might be better. Or maybe even hit up your dollar store for a little oven dish that is tested for safety. Some specialty stores might even have one inch - you name it.