Use Paper Coffee Filters
A slightly more modern alternative to cleaning mirrors or windows with newspaper (that's just as convenient, inexpensive and lint-free) is to use paper coffee filters. That's right. They're cheap (so you can buy an extra pack instead of having to forego your morning cup of java) and absorbent and won't leave your windows with a fuzzy coat -- or cover your hands with ink stains like newspaper will.
Adopt the same method as with the newspaper: dip the filters into a bucket of the homemade cleaner while wearing rubber or vinyl gloves, wipe the windows clean and then dry the windows off with a new, dry filter.