Every time I start the fan blower on my 99 VW gti after the car's been sitting overnight, I get this really nasty pungent disease kinda smell out of the vents. I open the windows and it blows away, and it's fine after the first 30 seconds or so.
So I decided to replace the cabin air filter. Yes, after 12 years. So I figure while I have it opened up, maybe I should spray some disinfectant or something else in there while I've got it all accessible. Good idea? Bad idea? Suggestions as to what disinfectant or anti bacterial spray I should or shouldn't use?