clean

An Afghan refugee girl washes a bed in a polluted stream, in a poor neighborhood on the outskirts of Islamabad, Pakistan, Tuesday, Sept. 30, 2014.

Muhammed Muheisen/AP

An Afghan refugee girl washes a bed in a polluted stream, in a poor neighborhood on the outskirts of Islamabad, Pakistan

Great Clock maintenance...A specialist technical abseil team clean and inspect one of the four faces of the Great Clock, otherwise known as Big Ben, at the Houses of Parliament, in central London, as they undertake essential maintenance and cleaning of the four faces. PRESS ASSOCIATION Photo. Picture date: Monday August 18, 2014. Photo credit should read: Yui Mok/PA Wire

Yui Mok/PA

A specialist cleaning team abseil down one of the four faces of Big Ben at the Houses of Parliament, London Read more

Workers clean and maintain the glass canopy of the Ocean Financial Center office building at the central business district of Singapore...Workers clean and maintain the glass canopy of the Ocean Financial Center office building at the central business district of Singapore November 28, 2013.  REUTERS/Edgar Su

Edgar Su/Reuters

Workers clean the glass canopy of the Ocean Financial Center office building in the central business district in Singapore.

Some 150 Buddhist monks and believers in white costumes wipe and sweep the 15-meter-tall Great Buddha statue

Jiji Press/AFP/Getty Images

About 150 Buddhist monks and believers on Wednesday wipe and sweep the 15m-tall Great Buddha statue that was built in 752 AD, at Todaiji Temple in Nara, western Japan. Monks and volunteers cleaned a year’s worth of grime from the Great Buddha for the annual sprucing up.