For cleaning windows you can also employ a Robot to do the job. Though i think a safety cable is a really good idea, not sure how that is done for a Robot worki

For cleaning windows you can also employ a Robot to do the job. Though i think a safety cable is a really good idea, not sure how that is done for a Robot working on the ceiling. https://azbigmedia.com/lifestyle/how-a-window-cleaning-robot-works-and-its-major-benefits/ https://azbigmedia.com/lifestyle/how-a-window-cleaning-robot...