i have a 91 ls teg, with no a/c and everytime it rains my windshield fogs up, the defrost blows out really good and the heat works great, rainx defogger doesnt seem to help at all, any suggestions or help???

 

Get vents for your windows.

 

check heater core, even though the heater works fine it can be a contributing factor if bad

 

There is moisture in the air, and when it's warmer inside and colder outside, the moisture is going to condense on the glass and fog it up. A/C works by drying and removing the moisture from the air. So if you don't have A/C, you're pretty much stuck with using a rag to wipe the moisture off the glass.

 

yeah thats what i figured, but i didnt know if there is a better product out there besides rainx that works