If you have very tall or high windows, here's a way to clean them that doesn't require you to get out a heavy ladder and risk your neck in the cleaning process. Buy and use a Swifter. Just spray window cleaner on the Swifter and extend the pole so that you can clean the entire window surface. Then replace the pad with a dry one and wipe up all the window. This is a very quick and easy way to clean tall or high windows.