The cleaning firm Karcher are currently spending three weeks cleaning the London Eye. But they have also tackled the Mount Rushmore National Memorial in South Dakota.
Phil Springall from cleaning firm Karcher explains the process of cleaning the London Eye.
The London Eye has been a fixture on our skyline since the turn of the Millennium and not once in that period has it had a full clean - until now.
Glen Goodman reports.
The team who are cleaning the London Eye are no strangers to tackling some of the world's most iconic landmarks.
These pictures of the London Eye cleaning were taken by a camera attached to a model helicopter. A team was using steam cleaning apparatus on the centre of the Eye.
A team of cleaners, complete with abseiling equipment, climbed up the London Eye during the night to start giving it a clean. The project will take three weeks and is being done by the cleaning firm Karcher.
The team will clean two or three capsules each night, removing the thirteen years of grime that has built up since the Eye started operating. However during the day, the Eye will operate as normal.