Here at Ruff n Tuff, we DO NOT just clean the windows, we also clean the screens.
Step 1: We use a commercial window cleaner which leaves a protective coating
Extra Step: This coating ensures that the windows will stay cleaner longer.
Step 2: We clean the screens
Extra Step: This way the dirt from the screens will not go onto the windows.
Step 3: We scrape and use a squeegee
Extra Step: So the window is more consistently cleaned, including corners and edges