Before using the product, the surface of the evaporator should be dried using the vehicle heater. The engine must be started for this. Then switch off the air conditioning. Set the temperature switch to max. (warm) and the heating and ventilation system to footwell, and then operate at max. blower capacity in air circulation mode for 10 min. Shake can well before use and position in the intake area of the air circulation system (usually the front passenger footwell) using the box. Set the air distribution switch to center fresh air nozzle (passengers) and top fresh air nozzle (windshield). Actuate the spray head with the windows closed, leave the vehicle and close the doors. After cleaning the surface of the evaporator, allow it to dry for approx. 10 minutes under the same heating and ventilation settings. Finally switch off the engine and ventilate the vehicle interior thoroughly with the doors open for approx. 10 minutes.