To prevent the refrigerator from freezing and frosting, we need to take the following measures:

1. Regular de-icing: If the ice layer in the refrigerator is too thick, it will cause frost. Do this regularly. De-icing can effectively prevent frost. It is best to perform a thorough de-icing every 2-3 months to keep the inside of the refrigerator dry.

2. Prevent excessive opening of the door: Excessive opening of the door will cause the loss of air conditioning and cause frost. Try to avoid opening the door for too long or opening the door frequently. At the same time, remember to close the door to prevent air from flowing in.

3. Maintain the sealing performance of the refrigerator: Check the sealing performance of the refrigerator door. If there is any damage, replace it in time. At the same time, make sure the door is sealed when closing the refrigerator door to prevent airflow from entering and causing frost.

4. Avoid placing too many items: Too much food and beverages in the refrigerator will reduce air circulation and lead to frost, so control the quantity and try to allow air circulation.

5. Adjust the temperature appropriately: If the temperature of the refrigerator is too low, it will also cause frost, so the temperature should be adjusted reasonably to keep the temperature in the refrigerator just right. It is recommended to set the refrigerator to a temperature between 0-7℃ to ensure normal operation of the refrigerator.

To sum up, the above points are effective measures to prevent the refrigerator from freezing and frosting. As long as we maintain it properly, we can ensure the service life of the refrigerator and reduce the trouble of cleaning up the frost.