1, the hamburger can be heated in the microwave oven for about 50 seconds. If the hamburger is refrigerated, the heating time can be extended as appropriate, but the time should not be too long, otherwise the taste of the hamburger will be reduced. In addition, when you heat the hamburger, you should open all its packaging bags.

2. How to heat the hamburger in the microwave oven without hardening: You can sprinkle some water on the hamburger, so that when heating, the water on the surface of the hamburger will evaporate first, and there will be some water in the hamburger, so that it will not be very dry and hard.

3. Wrap the hamburger with plastic wrap, but be sure to tie some small air holes on the surface of plastic wrap, which will not only help to dissipate heat, but also keep some moisture, so that the hamburger will not become too dry and hard.