A professional who cleans interior walls and ceilings of offices, apartments, and other buildings, by hand or by use of wall-washing machine. Respnsibilities include:

• Cleans walls and ceilings by hand, using sponge and soapy water or chemical solution, or presses lever in nozzle of machine to control flow of solution and moves nozzle fitted with porous pad over surfaces, exerting sufficient pressure to remove dirt and grease.
• May estimate cost of cleaning walls and submit bids.