When cleaning windows on high-rise buildings, old rubber in squeegees does not leave as fine an edge as new rubber. Learn how to replace squeegee rubber in this free video on washing windows of commercial buildings from a professional window washer. Expert: Jason Ihrig Bio: Jason Ihrig with Hi-tech Window Cleaning has been cleaning windows for more than 20 years. He specializes in all phases of window cleaning and has taught many employees the art of cleaning a window. Filmmaker: joseph wilkins