Should You Use Recirculation or Fresh Air Mode for Car Defogging?

[DiRosalie]

For car defogging, you should use the fresh air mode (external circulation). The specific reasons are as follows: 1. When you notice fog on the windshield, the fastest and most effective method is to first adjust the air vents to the front windshield, turn on the air conditioning cooling function, and activate the fresh air mode. Using maximum fan speed, it typically takes only about ten seconds to quickly "blow away" the fog on the glass. 2. If you want to completely eliminate fog inside the vehicle, you should choose to use the air conditioning's heating function to blow warm air on the windshield. Similarly, start with the fresh air mode, select the heating function and front windshield vents, wait for about 5 minutes, then switch to recirculation mode or simply turn it off. Of course, if your car has a heating function, the defogging effect will be faster and better.