See if the Sky Pro® Window Cleaning System is right for you at a no-obligation demonstration on Wednesday, August 11, 2010, at 10:00 a.m. Central Daylight Time (CDT) at the NuStar headquarters. The automated, self-climbing system operates from existing roof rigs or davit arms. Suspend over building, activate and control with a wireless remote. It washes windows, frames and most of the building exterior at 17,000 to 32,000 square feet per hour. For reservations, call Mike Dancha at the NuStar office.