I FOUND A COOL CLEANING WITH VINEGAR SITE HERE.
Windows - Cleaning with Vinegar
Many different vinegar cleaning solutions have been used for dirty windows. Here are two of the easier ones:
* 1) Use a 50/50 white vinegar water solution for normal dirt.
* 2) Use full strength warm vinegar for very dirty windows or windows that have dried paint or hard-water mineral spots.
Spray on the vinegar solution then wipe dry with a paper towel.
Alternatively, some people use crumpled up newspapers dipped in or sprayed with vinegar solution to wipe the glass, followed by a dry paper towel or crumpled up newspaper.
Why newspapers? Because they don't leave any lint behind, they are readily available, cheap and recyclable.
Another widely used vinegar formulation that is my favorite for cleaning windows, involves mixing white vinegar, water and rubbing alcohol(70%) as follows:
* 2 cups Water (500 ml)
* 1/2 cup Vinegar (125 ml)
* 1/4 cup Rubbing Alcohol (60 ml)
Those who use it claim that it works just like expensive commercial products and I certainly agree!