Originally Posted By: gathermewool
Just putting the information out there, bud. If I had to guess, I'd say most people who clean their windshields simply spray a bunch on and wipe it down, allowing for a good amount to dribble around and down rubber seals, where it sits.
Personally, I find that other products work better than Windex, and they happen to be ammonia free anyway. Old style Windex was a bit of a nuisance to keep in a cab. Of course, to save on costs, you refill old sprayers, and the sprayers and bottles don't last forever, and they leak and make a mess, or quit working, and so forth.
Basically, if one needs to save money and does a whack of windshields, go with Windex or its no-name alternative. But, the average person isn't going to break the bank by purchasing a more suitable product. Of course, if one is really, really cheap, there are cheaper alternatives to Windex, too.
As an aside, I thought I remember having read something about a dedicated Windex automotive glass cleaner. It says safe for tinted Windows, but it's around 40% more than regular Windex.