Why should I clean the car air conditioner?

During the operation of the automobile air conditioner, 80% of the tiny dust and bacteria in the air enter the air conditioner through the filter screen, and then stick to the evaporator after bonding with the condensed water, which affects the refrigeration and heat dissipation of the air conditioner. Because the humid environment and dust on the surface of evaporation box and ventilation duct provide a hotbed for the growth of mold and fungi, it produces the rotten smell of objects, which will pollute the whole car with the opening of air conditioning and be inhaled into the human body, thus leading to "car air conditioning disease". At present, people's concept of cleaning air conditioners still stays on cleaning the filter screen, but in fact, dirt and various bacteria (staphylococcus, Legionella, Aspergillus, influenza virus, etc. ) hidden in the gap of aluminum sheet in evaporation box. On the surface, they are hidden in the air conditioner and can't be seen at all, and they continue to enter the air inside the car through circulating airflow. Being in such an environment for a long time, they will feel dizzy, sleepy, uncomfortable, easy to catch a cold and so on.