11.   Professional window cleaners use clear, warm water to wash windows.

12.   That principle has worked not only for water pistols but also for dispensers of perfumes, window cleaners and other household products.

13.   The lines are easily removed post-holiday with window cleaner.

14.   Forced to live underground and worked as a window cleaner.

15.   Office workers clustered on rooftops and balconies, and window cleaners and construction crews stopped working to watch the sky.