there is a button marked "rest" (it is the A/C recirculation button). press it after turning off the car, if you had the A/C on. it will blow air through the system for about 5-10 minutes. it will warm up the system drying it out. that way water isn't trapped due to condensation. this is not a fix for the smell. you still have to clean out the cabin air filter and air ducts.