I know that when you select a professional window cleaner to service your home or business you want that person to have years of experience at their craft, be careful, and clean the entire window including the sills, frames, screens, and tracks without leaving streaks. You want this person to be able to navigate around and protect furniture and items in your home or business and put them back the way they were without doing property damage. You want your window cleaner to be professional, trustworthy, courteous, and show up on time.