ok so I finally got the go ahead to do a gym that I bid in my local area, I walked the property and looked and even touched windows. What I failed to see was the glue from window tint on every damn window. What was to take 8 hours has now doubled to 16. The glue had been cleaned so much that it merged into the window, I usually scrape for first clean and my blade stopped immediately and the fun began. I was able to save time using my unger himod pole with unger quick clean for hard to reach areas. In all lesson learned, know what you are really getting yourself into before you start.