Hey guys, I got my car serviced and they changed some filters on the car. Since the service, I noticed that through the air vent there is a kind of horrible moist smell coming through. It is only noticeable when I have econ turned on and aircon is generally fine. I know there are many threads like this - but I rang the guy who serviced my car and he apologized for not letting me know about the smell but says I need to get it treated - his cost was £50 + vat does that sound reasonable? anything I can do myself?