1, try not to put metal utensils in the microwave oven. Because microwave ovens can't penetrate metal utensils, food can't be heated. Some metal utensils are placed in the microwave oven, which will touch the inner wall of the microwave oven and cause ignition. Over time, the microwave oven will slowly be damaged.

2, put the plastic container can't put the microwave oven. Most plastic containers are not very plastic. When they are placed in a microwave oven, they are easily deformed under the influence of external forces. Moreover, some plastic containers with poor heat resistance are easy to burn in the microwave oven, releasing toxic gases, which makes it even more impossible for the microwave oven to heat better.

3. Lacquerware utensils should not be placed in the microwave oven as far as possible. The surface of lacquerware is painted with different colors, but when these things are heated by microwave oven, the paint on the surface will slowly fall off and melt, which will also produce some harmful substances, and food will be easily polluted when placed inside, and the container will also appear cracks in different degrees.

4. Disposable plastic containers are not suitable for microwave ovens. For example, yogurt boxes can't be thrown into the microwave oven. These boxes are basically disposable and can't withstand high temperatures. They will be deformed or melted in the microwave oven, and these melted chemicals will penetrate into food, and food will become toxic.

5, paper products, wood products can not be put in the microwave oven. Because these substances are easy to burn the container when they encounter high temperature, and even endanger the microwave oven, the inside of the closed inner container is easy to expand when it encounters high temperature, and it cannot be emitted. When it reaches a certain level, there may be an explosion phenomenon due to insufficient air in the container.