Microwave ovens have become an indispensable helper in modern life, but not all foods are suitable for heating in the microwave. First of all, metal containers should never be used when heating food, as microwaves can cause sparks and even damage the oven. Secondly, avoid reheating eggs with shells directly, as they may explode due to high pressure inside. Thirdly, breast milk or formula should not be heated in a microwave, as it can destroy nutrients. For fruits like grapes, heating them may produce plasma phenomena, which is very dangerous. In addition, avoiding the use of closed containers is also important, as steam accumulation can lead to explosions. To ensure safety and health, it's best to follow these guidelines when using a microwave. 🍴✨