While you may employ the same steps taken to clean the insides, a power washer will make the job much quicker—meaning you’ll be up on the roof for a much shorter amount of time. Use a window cleaning kit. Pin by Bonnie Moore on Atrium Container gardening Your windows are now clean. How to clean outdoor windows you can't reach . How to clean outside windows you can t reach. I'm going to try it because i have windows over a basement stairwell that i can't reach to clean. In a pinch, you can make use of dishwasher soap. Spraying directly on the glass always leads to wastage. Don’t spray the glass cleaner directly on the glass, spray on a cloth instead. You need to remove any cobwebs and debris before washing the windows with a solution. Follow the steps below to clean sliding windows. The whole process is quick and efficient, so you will have clean windows in no time no matter how high or hard to reach they are. We live in an eichler. If you do...