
Originally Posted by
orly_andico
I've observed something similar on our 2007 Mazda3. But then Mazda3's are well known for their stinky aircon.
Here's something I've done to avoid the stink on startup (it's not so bad on the Mazda3, just faintly annoying).
About 3 minutes before you shut off the engine (say when you enter the parking), turn the A/C off but leave the blower running. It's even nicer if you switch the A/C from recirculate to allow outside air in. Run the blower on maximum, with the A/C off. This will evaporate any residual moisture.
Also, you can try running the blower at maximum and heater at maximum for half an hour (the car will get very hot... do this at home). If there are any molds or something the waste heat from the engine will kill them.