Switch off the air conditioning unit of the car.  Disassemble the pollen filter. 

Set the ventilation system to internal circulation (close the external air intake) and direct it onto the windscreen. Switch off the fan. 

Shake the bottle well, fit the pipe in the lid onto the nozzle and lead the pipe on full lock into the main air ducts of the air conditioning unit. 

Spray the aerosol for few seconds and by continuously pressing the nozzle, slowly remove the pipe by ensuring that the formed foam is spread everywhere. 

Spray the product onto the cooling fins of the air conditioning unit and the place of the pollen filter as well. 

The foam sprayed on inappropriate place must be wiped off immediately.

After 20-30 minutes of waiting period, thoroughly ventilate the car and switch the fan on. (During this time, stay out of the car.)