You will need a hose with a good spray nozzle, some kind of scrubber (I like this one from Amazon) and a long-handled pole for windows that are out of reach.
Spray windows with the hose and that powerful spray nozzle, knocking off dirt, grime, and debris. Set the hose aside.
Dip your scrubber of choice into the solution and get it totally saturated. Don't wring it out.
Scrub the window thoroughly in all directions, making sure you reach the corners.
Spray window again with clear water using the hose and a powerful spray nozzle.
That's it! Both the dishwasher detergent and rinse aid will create a "sheeting" action, to leave windows clean and streak-free.