Re: Smells bad!
The air con tracts tend to get a little moist if used with the AC on a lot of the time, especially with re-circulate air function on. I've found that if you run the fans without the AC on for a bit, ideally with the windows open, the smell fades away. If not, Halfords or similar sell in car AC deodoriser bombs which are designed to clean any bugs or bacteria from the air pipework. They are like ring pull cans which you put in the car after pulling the top off and close the door. The chemicals in the can then circulate inside the car and remove all unpleasant odours or something like that!