How much do you know? Check out what is true and what is false below (click the question mark to find out!) as Mr Dorsey, the best teacher in this universe, challenges you - what do you know?

The first recorded actual cleaning profession was Vincent Vagolies in Rome, 1657
45% of cleaners are men
The single blade window cleaning squeegee was invented in 1936 by Ettore Sceccone
Salt is often used in manufacture to thicken neutral detergent (washing up liquid)
The biggest house to be cleaned by a sole cleaner is Dartmoor Estate
Taiwanese toilet attendants actually live with their families in some facilities
Most cleaning products are made by the same company, Driscol
Queen Elizabeth II prefers to clean her own bathroom
Experts recommend using vodka as a cleaning solution for diamond jewellery
The highest price paid for a vacuum cleaner was at an auction in Spain where the bidder paid ten million dollars for an antique Russian machine once owned by the household of Czar Nicolas II