I have a 2001 325i...which has performed great and without problems. Yesterday my wife drove it has turned on the A/C, which had not been used in a few weeks. Since then the car has a smell, much like smelly socks. I have tired to blow it out by turning the vent on high with and without the A/C. Even had the heat on for a while. WHAT THE HELL COULD IT BE. I'm am worried it may have some kind of mold or something.