Originally posted by: Accipiter22
i know! I get a weird haze on the inside of my windshield no matter what I use...not sur ewhy
As a detailer I get this a lot, it could be caused by smoking, but it is always there because when the sun beats down on your car, it evaporates all the oils and dirt from your dash (especially if it is leather), and any other previous shine or cleaning products, and causes them to then get in the windshield, because obviously it cannot pass through it.
The best way to clean it is to get some water and rinse it once. Then get some spray on auto glass cleaner or windex is fine, and take a nice microfiber towel and continue to clean it. Make sure to only do one section at a time, as it needs to be wiped completely DRY right after cleaned, so it does not smear.
Smudges could also be do to interior cleaner getting on it accidently, amour all sprays are horrible. And, on the outside RainX always leaves a kind of smear if not applied right, like all windshield waxes.