How do you clean the inside of your windshield?

[Perfectlap]

Originally Posted by RandallNeighbour

Perfectlap, you polished the inside of the window or the outside?

outside. But I was tempted to hand apply the polish to the inside. Perhaps there's pollution on the inside as well.

Originally Posted by CHRISP357

Do you need any sealant after that?

Nope. I presume they added some sealing additives to the polish itself.

[RandallNeighbour]

Perfectlap, you polished the inside of the window or the outside?

[Fintro11]

wish you could polish off sandblasting :P

[Pdwight]

I tried this and had pretty good luck with a microfibre towel, then I cleaned it with Invisible Glass and still this is a ongoing struggle...for some reason my E36 seems to be worse than my Boxster (and that windshield is only 3 years old)

[Finnegan]

I'm still waiting for nanites to do this work for me!

What year is your E36? I have a '95.

[mistermac99]

I use newspaper to clean all glass. Cars and home. I get a pump spray bottle, add a small amount of dish detergent, then the rest water. Spray a good amount on the glass and clean with newspaper.
After cleaning, I use a microfiber towel to remove any leftover film.
This technique works well for me, and is very cheap.

[Finnegan]

These work remarkably well on the inside of the windshield:
https://www.amazon.com/cloth-Home-Cleaning-Set-Piece/dp/B00A391WW8

[Mr Flat Six]

I work professionally as a car detailer and windows are definitely annoying. An easy and simple way is to use one towel as a cleaning towel and another towel as a drying towel in a way. Make sure the cleaning towel does not get too saturated though or else it wont work as well. This will work well with pretty much any towel. Paper, microfiber, waffle weave, newspaper, etc. Its not the best method but its very efficient when you get it right and will get your windows 95% clean and streak free.

[particlewave]

I started my own photocopier repair business when I was 19. I did that for about 8 years.
Most "repairs" actually just involved cleaning due to dirty optics.
After trying many different products and techniques, this method is what works best:

1) clean thoroughly with a paper towel saturated with rubbing alcohol to remove any dirt or grime.
2) quick wipe down with a wet towel or cloth to remove any residue and to wet the glass.
3) buff dry with a clean, dry towel to remove/prevent streaks (terrycloth towel or rag works best).

Most glass cleaning products will leave streaks or residue that may take a week or two to show up, especially ammonia based.
The above method works great every time and will leave the glass clear and streak free.