I bought one of those cans by locktight i think, that you put in the car with the aircon on the whole can is used and must get sucked in and is supposed to get rid of bacteria and smells, it made no difference at all to the smell, If you dont use the aircon often it will smell musty. I had mine re gassed and its been ok but it did cost me £90 but im in the trade and it will. prob cost you more now hope this this helps