x2

On cooler there is always dust and lint , pollen and other debris .
When the air conditioner is running - moisture condenses on the cooler. Rubbish abundantly wetted, it as an incubator for bacteria. Over time, you get a real livestock farm on your cooler and other places. Bacteria are so many and so much **** that even a strong smell in the cabin.
To begin with a thoroughly cleaned , then disinfected . Then - according to the Sleeper method. Off the air conditioner for about 5 minutes before the end of the trip, current air will dry cooler and destroy the cause of the growth of bacteria .