Originally Posted by Meth68
partyman66 thanks for the info i will give it a shot. So if its like 75 and humid out, you still suggest going 80-0 degrees? It was funny because after being completely clueless on the different combinations i gave up and called some friends while i was out and they were cracking up. I put over 15k into my coupe have a full carpc setup and I cant manage to remove condensation on my window lol.
I'm not really sure of exactly what the make-or-break temperature is to put the system on to keep the windows clear on both the inside and the out.. I actually usually set mine all the way up to 90 to keep it simple and just put the blower on the front-window-defogger-only setting so it's not blowing onto my legs at the same time as the windshield, and the fact that the side windows are at least partially open usually keeps the rest of the car at a comfortable temperature.
Someone mentioned that they thought it was from the windows being dirty, but to tell you the truth... I think it's actually from the exact opposite of that. I wash my car at least once every 10 days and wax it like once every 5 weeks or so, and I also wax my windshield. I think that the fact that the outside windows are soo clean and also waxed might have something to do wtih the fact that water condenses on it soo easily. I've noticed that when my car is freshly waxed, it picks up condensation on the paint at night noticeably quicker than all the other cars in my yard... but when it's in need of a wax, it doesn't do that. If the same theory holds true to the waxed/cleaned windshield as it does with a waxed/cleaned paint surface, that would help explain why you and I are getting such a foggy outer window with the AC on Defog.