How to clean air conditioning pipes

Cleaning method of air duct of automobile air conditioner: 1. Remove the air conditioning filter and open the window. Then start the air conditioning external circulation mode and adjust the wind speed to the maximum. 2. Spray the purchased air conditioner deodorant at the external circulation air inlet, stay for about 20 seconds and close the window, so that the cleaner can thoroughly clean the air conditioner and play a good role. 3. Turn to the internal circulation mode again and adjust to the maximum wind speed.