While driving on the highway in my 97 Legacy wagon with the air conditioning on, I noticed a steam-like substance coming out of the vents. I could actually see the airflow. It wasn't hot, and when I put my eyeglass in front of the vent, no fog condensed on it. There was no odor either. When I turned off the AC, the "steam" disappeared. My girlfriend says it's just steam. Why would steam be coming out of the vents? Has anyone encountered this?
Thanks, Wayne