1. It may be that the refrigerator door was not closed in time when food was taken from the refrigerator, or it was not closed tightly when it was closed, which caused the water vapor in the outside air to run into the refrigerator, and the small steam liquefied into small water droplets, which condensed into frost when it met. 2. It is also possible that the food is not suitable in the refrigerator, and the food is placed particularly close to the inner container, resulting in frost in the refrigerator freezer. 3. When setting the refrigerator temperature, adjusting the refrigerator temperature too low will cause water to flow out of the refrigerator, and if it is not cleaned in time, frost will form.

Suggested solution:

1, when using the refrigerator at ordinary times, be sure to close the door in time and lock the refrigerator door. You can use a hair dryer to remove the frost from the refrigerator. Don't turn on the maximum hot air when blowing, turn the hair dryer to the minimum, then take it out at the refrigerator, and wipe it with a towel to absorb the moisture melted by the frost.

2. When defrosting, be sure to unplug the refrigerator, then take out the food inside and pour bowls of hot water into the refrigerator. The water temperature should not be too high. After a while, you will find that the frost in the refrigerator has fallen off. After all the ice cubes fall off, dispose of them immediately, and then wipe off the remaining water stains with a towel.

3. Don't put food too close to the liner, and put food correctly. At the same time, the temperature set in the refrigerator should not be too low or too high.