A Window Cleaning Platform is a platform that can ascend and descend the faces of skyscrapers and other large buildings to clean windows. In Grand Theft Auto IV, window cleaning platforms are operable and featured on several buildings in Liberty City. Window cleaning platforms are used in three missions in GTA IV (Blood Brothers, Deconstruction for Beginners, and Late Checkout) in which they are used to ascend buildings to gain a good sniping position or advantageous assault/escape, although the one from Late Checkout is taken down after completing it. Window platforms can also be used outside of missions. The player can control the movement (up or down) of the platform to ascend to the top of buildings. On the website Whattheydonotwantyoutoknow.com there is a forum post showing the location of all the platforms thoughout the city. A non-operatable wooden Window Cleaning Platform is also present on the San Fierro Tower in Grand Theft Auto: San Andreas.