[B58 parts]

I like to clay bar the outside of the windshield, and ISO alcohol on the inside for the plastic vapors. The glass cleaner product doesn't really matter, I have good luck with the cheap concentrate stuff from home Depot. It's all about the clean towel. Also wax on the outside of the windshield is nice, the rain just rolls up. That and a little of the gummy fledge rubber conditioner on the wipers is great for the rain.

[V1_ROT8]

Originally Posted by B58 parts

I like to clay bar the outside of the windshield, and ISO alcohol on the inside for the plastic vapors. The glass cleaner product doesn't really matter, I have good luck with the cheap concentrate stuff from home Depot. It's all about the clean towel. Also wax on the outside of the windshield is nice, the rain just rolls up. That and a little of the gummy fledge rubber conditioner on the wipers is great for the rain.

I clay the outside of my windshield as well. Typically every spring.

[jkoral]

Originally Posted by stbm5

So what’s the source?

https://f87.bimmerpost.com/forums/sh...2&postcount=10

[Raygt3]

Using news paper worked great till they took the lead out of news print ink. The lead in the ink would actually polish the glass and provided great results. So if you have any pre 60’s news paper lying around give it a try.
Another cheap fix was deionized water and a bit of vinagar. Works great on outside windows.

[co_440i]

Griots Glass Sealant and OEM (Bosch?) wiper blades. No streaks. I *do* sometimes get little streaks on my door windows when wet, especially as they do the auto-drop and -raise being a 2-door.

[Yuille36]

Some people even go so far as to have all their glass ceramic coated. No streaks whatsoever.