This is a hypothetical question, but I could see it happening to me one day.
A father uses a public microwave oven to cook supper to feed his children. The microwave is technically clean, but he is nervous that the "fumes" from other dishes previously cooked in there will "contaminate" the meals of his young ones. After realizing that he wants his kids to eat healthier, he decides that he wants to take action. He wonders if it is safe to double-wrap the food in saran wrap or possibly some other material. Should he do this? It might be unsafe and would release plastic toxins into the food if not cause a fire in the microwave? However, if it is safe, then what is the best material to use for the wrapping?