While it is good that foods are overcrowded inside your fridge (it means overabundance, of course!), it is important to note that it can be harmful to your health too. One good reason for not overcrowding food in the refrigerator is to allow cold air to circulate and maintain the temperature inside. When the temperature is not maintained, some food may spoil easier. In addition to this, it is very hard to distinguish fresh food from what is rotten if the refrigerator is overcrowded. On the other hand, it is also not a good practice to keep the fridge empty either. A nearly empty fridge requires more power to stay cold than a full one.
– Flora Oluwafemi, Sarah Akpoguma, Taiwo Oladiran and Adelodun Kolapo. “Microbiological Quality of Household Refrigerators in Three Cities South-West of Nigeria.” Journal of Microbial & Biochemical Technology, 2015: 206-209.