Rather than simply mask unwanted odours, the mist from Meguiar's Air Re-Fresher finds and neutralizes the odour molecules in your car's air conditioner vents, roof liner, under seats and all other hard-to-reach areas by using your car's A/C recirculation system all while leaving a pleasant, fresh scent in its place. Also available in New Car Scent. How easy is it to use? An easy-to-use, single-use odour remover that neutralises the toughest odours throughout the entire interior. With the engine running, A/C set to recirculate and fan on high, depress the locking trigger. Then close the doors and allow Air-Refresher to go to work for approximately 15 minutes. It's that easy.