Should a microwave be replaced when exposed to metal object?

It depends on the type of metal object and the extent of exposure. If the metal object is small and does not touch the inside of the microwave, it may be safe to continue using the microwave. However, if the metal object is large or touches the inside of the microwave, it can cause arcing and damage the microwave. In this case, it is best to replace the microwave.

Here are some tips to avoid exposing your microwave to metal objects:

* Do not place metal objects in the microwave. This includes utensils, cookware, and foil.

* Do not use the microwave to heat food in metal containers.

* If you must use metal in the microwave, make sure that it is at least one inch away from the inside of the microwave.

* If you are unsure whether or not a metal object is safe to use in the microwave, consult the microwave's owner's manual.

By following these tips, you can help to avoid damaging your microwave and keep it safe to use.