A wonderful window cleaner can be made out of the following:
Mix 2 cups of hot water with 1/4 cup of vinegar and a tablespoon of cornstarch. Mix very well, and the pour into a spray bottle. Use with crumpled up newspaper. The windows will shine!
Put all the ingredients into a clean spray bottle and shake to mix. Use as you would a commercial glass cleaner. Spray on glass and wipe dry with a clean cloth or newspaper.