
http://www.rainx.com/
This is the best shit EVER.
You clean your windshield with it, and for about a couple of weeks afterwards you won't need to use your wiperblades very much at all.
Raindrops will bead on the glass and just blow right off with the wind as you accelerate.
Also, you never have to use an ice scraper to clear your windows after a snow or ice storm, because it prevents it from fusing with the glass. You can clear your windows with a brush.
Untreated side on the left, treated on the right:

I am a big fan of Rain-X.