Have you ever really given thought to how that IMAX screen stays clean? When they tower over the audience several stories high, keeping the screens free of dust, gum and nacho cheese is no easy feat. The largest screen in the world is the 540-seat Darling Harbour IMAX located in Sydney, Australia at 117.2 feet wide and 96.5 feet high. A regular-sized screen might earn $90, but an IMAX-sized screen could pay thousands plus travel costs. Cleaning such a large area can take several hours so cleaners need to work nights when movie goers are not in the theater. One company that cleans screens all over the world pays a starting wage of $30,000 to $40,000 to new hires and more for those with experience. People with a fear of heights need not apply.