I have noticed at the bottom of my winshield ive been getts alot of fog down there............Dont really understand it because its been 90-100 degrees here in the DFW.........When I turn on the defroster nothing happens fog just seems to stay there unless I clean the glass


What could be happening bad seal on the windshield???

 

Possibly an antifreeze leak. You should be able to smell it if its leaking.

 

Is it only near the defrost ducts? If so, suspect leaking heater core or moisture from working AC or water in the AC box cause by rain or washing.
If it is across the whole lower WS, suspect plastic outgassing. That is a common occurance and sice the bottom of the WS is close to the dash, that could be the issue..

 

Definetley not a coolant leak, ill check some things Rob and get back to you, you might just have something here.

 

x2...

 

This can often be caused by excessive application of Armor-All or similar products to the dash board.

 

It seems to be across most of the ws......

I have not used any armor all or any product on my dash ill give it a thorough cleaning though.

 

Can somebody explain plastic outgassing?

 

Plastics contain chemicals that continue to evaporate (outgas) long after the parts are made. These chemicals condense on the windshield, forming the fog. Same goes for coatings like Armor All. Even if you've never used it, the previous owner may have. That's what happened with my Allante. Never could keep the windshield clean.

 

I have that problem with my rear window fogging. I recovered the interior with new headliner and pkg tray covered with the same mat'l as the seats. So I use fine steelwool and window cleaner to remove it. Be carefull around painted surfaces with the steelwool.