Use a soft brush or a sponge and remove dirt or cobwebs from the window surfaces. Mix equal parts white vinegar and water in a bucket. Add a few drops of dish soap to help cut through grease and grime. Use a hose with a sprayer attachment to wet the window thoroughly.

Dish Soap Solution Believe it or not, one of the most common and effective window cleaning solutions that is used by professionals is a mixture of dish soap and water. Simply mix one gallon of water with two teaspoons of liquid dish soap, and you have a professional window cleaning solution.

Extend Window Life These marks can weaken panes, potentially leading to cracks, chipping and other expensive damages. Professional window cleaners will extend the life of your windows by using their expertise and specialty cleaning process to maintain your windows.