[KAY-OS]

Originally Posted by H2O_Doc

Sounds like it MIGHT be mold due to condensation. Lysol won't help for long.

Originally Posted by Maynard

If changing out the filter does not remedy this, you need to kill all the mold within the system, then make sure you don't have a malfunction in your AC system (I'm told it is supposed to run on a little bit to dry out the interior, but this may be insufficient for Hong Kong climate). I was always taught to run the blower with the AC off for the final 5 minutes or so of each trip to prevent this, but I don't practice it regularly in my 2'er (older cars seldom had anything to help dry, and seldom even a filter). Killing interior mold usually requires ozone treatment or some other chemicals - lysol might do it, but not likely; I'd look up a pro, since then you'll have a warranty to redo it if the first try doesn't work.

Thanks for your inputs. I will definitely look into ozone treatment. I don't know much about how AC works, but I am guessing ozone won't treat the bacteria/fungus externally e.g. the evaporator? I was hoping to try a cheap DIY method like spraying lysol first. Any ideas where the fresh air intake for the AC is located?

Turning off AC with fan only for 5 mins before destination in the summer climate where I live is impossible (hot and very humid) .