I have done a search on the site, but I haven't found an answer to my problem. I have a pretty acrid smell coming from the vents in the dash of my GT. The smell is not noticable with the windows down. With the windows up, you get the smell with the fan on or off. It seems to me that I once saw a product on a car show on TV, that is sprayed and inducted into the fresh air intake on the cowl that will disinfect / deodorize the system. I can't remember what it was or where to get it. A Google search didn't find anything of value. Does anyone have a clue as to what the product is? Or perhaps a method they have used to solve this problem? I am sure that since we are dealing with ~ 40 year old cars that this is a common problem.