Cleaning/Odor Removal in Ducts
Every winter I notice a stale, sickly sweet smell emanating from the air vents. Sometimes it's there, sometimes it's not. It seems to depend on the changing air pressure differences between the rooms and the air ducts. During the summer I don't smell anything. The previous owners of the home did not tell me about this, and they had pets (including a cat). I wonder if I have the same problem.