This is something that I've read about and also noticed on my own car. Even if I thoroughly wash the exterior of my windshield, it is obvious that there is still a film in the area that the wiper blades cover. As the water sheets, it is clear that something is still on the surface.

A long time ago, I read that there are a couple ways to REALLY clean the windshield, removing absolutely everything from the glass. Since then I have forgotten. All I can remember from the article is that it was a relatively old, little known cleaning powder.

I'm interested in upgrading to the PIAA wiper blades and I would like to start with a REALLY clean windshield so that the silicon coating can be at it's best.

Does anyone know of a method to REALLY clean the outside of a windshield? A cleaner or process that will remove everything but will not damage the glass surface itself?

 

At the www.griotsgarage.com web site there was a mention that you can use paint cleaning clay to get your windshied squeeky clean. I'm don't know how well it works on glass or what you would use to lubricate the clay when using it on glass. Since I have never tried it for that use myself. I can tell you that Griots paint cleaning clay works great at cleaning your paint when used in combination with thier Speed Shine product (as a lubricant for the clay).

 

I have been doing an old "trick" for years.

Use a Cleaner/wax like Meguiers and lightly wax the windshield with it, Let dry WELL, and buff it off with a nice clean cloth

Since it useally strips rainspot,etc of your paint it MOST TIMES will do the same for the windshield.

.02

Shotgun

 

what i've been doing is using "no touch" bug and tar remover. a tube costs about $5 and i get about 7-8 uses when i put it on all the windows. easy to use too, just get a pad (like the ones for waxing) and rub it on. then spray it off with the hose.

 

just some help.
one of my best friends dad owns a chain ofauto glass specialist shops.
and i was told anyone can get a windshield clean, but thats only 80% clean....theres really nothing you can do to get it 100% clean.
but 80% looks good to me!