Safety Measures While Using Plastic Packaging
Plastic cling films
Avoid using plastic cling films in ovens, as the films may melt into the food and cause harm or just catch fire. Prefer using cling films which are specially designed for microwave oven use.
When re-heating or cooking food in a microwave oven, ensure that the microwave-safe cling film does not touch the food. If the film touches the food, the film could get overly hot and possibly melt or may transfer chemicals into the food.(via)