How To Clean Outdoor Windows You Can't Reach. Professional window cleaners use a specially mixed solution to clean your windows. Second bucket, water and vinegar (about a cup vinegar to about 1 gal of water)and a second rag to rinse the window.
Even if you spray carefully, it doesn’t totally eradicate or control the issue of wastage. Clean the area around the windows within reaching distance with a vacuum cleaner and for the higher windows use a broom with a long handle. For example, never climb out onto a window ledge or dodgy fire escape to clean your windows.
Your windows are now clean.
Once you spray at least a small part of the outer window with cleaning fluid, it'll glide across the rest of the glass, leaving a sparkling, spotless trail in its wake. Only wish i could use it on the inside as well. 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. In a pinch, you can make use of dishwasher soap.