Ocean’s 11 – the George Clooney version – has horrible scenes in – the ones where they make the room dirty so that the hotel inspector will suffer. The thing is – you cannot see the germs until he shines his light on the bed – then – well you may well have seen the film.
They use those lights at crime scenes – I have read about them in books by Patricia Cornwell and Jeffery Deaver. And, of course, I have seen them in TV shows like CSI and Silent Witness.
They shine the lights and so much is uncovered – so much is exposed – blood and germs – all sorts – so much that is invisible to the naked eye.
Makes you wonder if anything is actually clean.