If the car's outer vents are aimed at the side windows then misting can be eliminated.
If the car's outer vents are aimed inwards then, in a hot climate, a comfortable environment is obtained in the passenger compartment.
Opening and closing the air vents
Turn the knob in order to open/close the air flow from the vent.
The air flow is at maximum when the marking on the knob is in vertical position.
Aiming the air vents
Move the lever sideways/vertically in order to aim the air flow from the nozzle.