1) Remove the grid from the back of the car perfume holder 2) Remove the empty fragrance membrane from the holder 3) Place the new fragrance membrane in the holder with the aluminium side upwards, pull the aluminium strip through the opening of the grid and clamp the grid to the holder 4) Carefully remove the foil without damaging the membrane 5) Click the clip onto the holder in the preferred position 6) Click the holder onto your car’s fan 7) Adjust the fan speed to regulate the intensity of the fragrance