If you want to get the cleanest windows ever, guaranteed no streaks, hardly any wiping, go to Linens n Things and get a product called "Perfect Glass". It is in a black pump container and you can buy refills too. Lasts a long time too.
I first tried it maybe 2 years ago and would never go back to any other product. It is ammonia free. I use either paper towels or those special microfiber cloths and mirrors and windows look like a professional did them. Easy, does the job better than anything I have ever used.
Forgot to add the link for the blurb about it.
http://www.google.com/pagead/iclk?sa...og%26k%3Dglass