cleaner

A maintenance worker mops steps at the Beijing Olympic Stadium, also known as the Bird's Nest, in Beijing, Thursday, Aug. 20, 2015. Final preparations are being World Athletics Championships, which runs from Aug. 22 to 30.

Mark Schiefelbein/AP

A maintenance worker mops steps at the Beijing Olympic Stadium, also known as the Bird’s Nest, in Beijing, Thursday. Final preparations are being World Athletics Championships

A cleaner works on Centre Court ahead of play on day three at Wimbledon on July 1, 2015 in London, England. The 129th tournament to be hosted at Wimbledon is due to run for two weeks from Monday 29th June

Carl Court/Getty Images

A cleaner works on Centre Court ahead of play on day three at Wimbledon on Wednesday in London, England

A window cleaner works on a building in the financial district of Canary Wharf in London January 22, 2015. European shares rose for a six straight day early on Thursday as investors bet on the size and shape of a sovereign bond-buying programme the European Central Bank will set out later in the day.

Kevin Coombs/Reuters

A window cleaner works on a building in the financial district of Canary Wharf in London

A cleaner sweeps a balcony of a grandstand ahead of the Indian Formula One Grand Prix at the Buddh International Circuit in Noida, India, Thursday, Oct. 24, 2013.

Saurabh Das/AP

A cleaner sweeps a grandstand at the Buddh International Circuit in Noida, India, ahead of the Indian Formula One Grand Prix 

A man cleans the secondhand spare part of a vehicle at a shop in Colombo's Panchikawatte Road October 23, 2013. The area is frequented by the middle class and is known for shops that stock on Japanese and European secondhand vehicle spare parts. The spare parts are sold for between 500 to 100,000 Sri Lankan Rupees ($3.80 to $765), and vendors say business has been brisk as brand new parts are expensive to purchase.

Dinuka Liyanawatte/Reuters

A man cleans a spare part at a shop in Colombo’s Panchikawatte Road on Wednesday. The area is frequented by the middle class and is known for shops that stock second-hand spare parts for Japanese and European cars.