So now it's summertime and I'm using the A/C a lot more. When the A/C is on, things are fine, but whenever it cools down and I switch back to Economy mode, there's a kind of "Old rag/dirty sock" smell that comes out of the vents for a good while. Any ideas on how to get rid of it? I tried spraying a bunch of lysol through the front cowl air intake with the fan running, which sort of helped a little, but the smell is still present. Do I have to take out the fan?