Can aluminum foil be used inside a microwave oven?

With a few small strips of foil around the edges of a glass cake pan, you can keep the edges of the cake from drying out and burning, which microwave ovens tend to do to most foods with lower moisture content. read more

Substantial pieces of metal, like the walls of a microwave oven, can usually tolerate these currents without any problems. However, thin pieces of metal, like aluminum foil, are overwhelmed by these currents and heat up very quickly. So quickly in fact, that they can cause a fire. read more

No food completely covered by aluminum foil or in a covered metal pan should be put in a microwave oven because food wouldn't be able to absorb the microwaves. Operating the oven empty or when the food is completely wrapped in aluminum foil can also cause damage to the oven. read more