I recently left my car (Honda Accord) in the parking lot of my apartment complex for a little over a month while I was out of town. It was working fine when I left.
Now that I've come back, I've noticed something visible coming out of one of AC vents (only when the AC is on). Sort of like a light smokey look-- but it's not actually smoke. The other AC vents act normally. It has a slight smell, but I can't identify it.
Otherwise the car looks, sounds, and feels fine to drive. Does anyone know what might be wrong with the vent and if there's a simple thing I can check to fix?
I currently live in Houston, TX so it was very hot and humid for the month that I was gone-- not sure if that could have caused anything.