avoid all this by purging your a/c system after every use of your Air conditioner..Purge = leave fan on and turn a/c heater system onto vent and let it blow some before you exit the vehicle..This will dry the moisture inside the ducts... eliminating the possibility of mold and mildue growth.. Therefore no smell...
this is ok. but come to think of it, why not spray from the outside air damper/intake to ensure that the whole system or air ducting is cleaned? no offense meant but it how scotty kilmer does it....
Now I have come from the car workshop I changed the AC blower because of this foam. When I asked him about the AC blower he asked me did you use AC foam!!??