Make Your Own Cleaner
Don't waste money on expensive commercial glass cleaners when you can easily mix up excellent and highly effective glass cleaners at home for less. Next time your store-bought cleaner runs out, thoroughly rinse out the spray bottle and follow our recipe for windows that really need a good clean (as well as for mirrors, glass panels on furniture, and the like).
Combine 2 tablespoons ammonia, 1/2 cup rubbing alcohol and 1/4 teaspoon mild non-antibacterial dishwashing liquid. Using a funnel, pour the mixture into a rinsed, recycled spray bottle. Then spray it on windows, just as you would commercial glass cleaner, and wipe.