Where does the moisture in the refrigerator's inner walls come from?
It's understood that most moisture comes from the air. When people open the refrigerator to store food, the indoor air and the refrigerator's atmosphere exchange freely, with humid indoor air quietly entering the refrigerator. Another portion of the moisture comes from the food stored inside, such as clean vegetables and fruits placed in crisper drawers. The moisture in these foods evaporates and condenses into frost upon cooling. Especially in summer, the indoor temperature is high, humidity is high, and there's a large temperature difference between the room and the refrigerator. When the refrigerator is opened, a blast of cool air flows out, while indoor air enters. Within a short time, a layer of white frost condenses on the refrigerator walls. People have also found that even when the refrigerator is empty, a thick layer of frost will form inside if it's frequently opened, indicating that a significant portion of the moisture in the refrigerator comes from moisture in the air.
Effective Refrigerator Defrosting Techniques
Some refrigerators require defrosting. Manual defrosting is time-consuming, laborious, and often ineffective. Here's a recommended defrosting technique.
Cut a slightly thicker piece of plastic film according to the dimensions of the refrigerator's crisper compartment. Stick it to the frosted wall of the crisper compartment; no glue is needed, it will stick easily. To defrost, temporarily remove the food from the crisper compartment, then peel off the plastic film and shake it to remove all the frost. Then, re-apply the film, put the food back in, and continue using the refrigerator.
