1. Avoid overtime heating: Put food in the oven to defrost or heat it. If you forget to take it out and the time exceeds 2 hours, you should throw it away to avoid causing food poisoning.

2. Avoid using metal utensils: Iron, aluminum, stainless steel, enamel and other metal utensils placed in the furnace are prone to sparks, which can damage the furnace body and cook undercooked food.

3. Avoid using plastic wrap to come into contact with food: When using plastic wrap, it is best not to let it come into direct contact with food during the heating process. You can put the food into the bottom of a large bowl and seal the mouth of the bowl flat with plastic wrap. Or cover it directly with glass or porcelain instead of plastic wrap, which can also seal the water vapor and make the heating rapid and even. You can puncture the plastic wrap before taking out the food to prevent it from sticking to the food.

4. Avoid fried foods: high-temperature oil will cause splashing and open flames. If a fire accidentally breaks out in the furnace, do not open the door. Turn off the power first and wait until the fire is extinguished before opening the door to cool down.