Sparkling clean windows make a huge difference, but they are one of the most difficult jobs for the average homeowner to accomplish. Clean windows let the light in and provide a beautiful view of the outside, whereas grimy, spotted, and streaked glass panes lend a messy appearance to your home as a whole and inhibit the flow of sunlight.This is especially true if ladders or leaning through windows for access is involved in the process. To top it all off, you will typically find that even after all your work and effort, your windows are often even more streaked and smeared than before you started!