Quote Originally Posted by Daox
Quote Originally Posted by Unidentifiable
It's a good idea to polish your windshield once a year. It can't hurt anything, but it may enlighten you a little bit, or at least make the world seem like a brighter place through your windshield. Especially if it's a few years old...
How would you recommend doing this?
Start off with wax and grease remover, scrub all the glass clean, inside and out.

Switch to any alcohol based (alcohol is biodegradable, ammonia is pretty harsh... I don't use Windex.) cleaner and scrub with the cleaner and clean paper (not a cloth, use paper. Even newspaper works.)

Check the condition of the windshield at this point. If it's got any kind of streaks and/or glare, you'll need to get some glass polish, and follow the directions on the can. The ones I've used (none particularly) recommend scuffing the glass with very fine steel or copper wool (copper doesn't come apart as quickly or leave grit behind as much, but also takes longer to use properly), then use the polish, normally with a buffer or buffing cloth. This removes micro-scratches and bug-dings. (Yes, a bug's head can do a number to glass at 70+ MPH.).

Polishing isn't usually necessary on the inside, as it's seldom damaged. Smoke residue and road grime will build up on the inside of the window, though, so clean it thoroughly with wax/grease remover and alcohol-based cleaning agents.

It takes awhile to get it fully done, but you'll likely be very happy with the results.

Done properly, it will also remove the obvious "wiper lines" that show the path of the wipers, which are normally only visible when the buzzard in the opposing lane leaves his high beams on, blinding you with glare... yeah, you know what I'm talking about.