Perfection Antibacterial Fogger Sanitiser Bombs are a one use total release sanitiser to fog an area, laying a sanitiser down on all surfaces in that space. Depress the button and close the door to your vehicle or room to sanitise that area! For a car turn on the engine, put the air conditioning in recirculate, and depress button. Then close the door and allow the can to empty and the sanitiser to work its way around vents. Open doors to vent the car and it is now sanitised. Strong bactericidal & viricidal 90% alcohol formula clean & sterilise.