Today’s invention is another tool to help improve the handwashing of hospital medics (a New York Times article recently claimed that washing only happens about 1/3 as frequently as training requires).
All medical staff in contact with patients would wear a brightly coloured bracelet. This would contain an aerosol full of harmless, water soluble paint.
The bracelet would also contain a timer which would ensure that a small spot of bright paint was delivered onto the back of a medic’s hand, say every ten minutes throughout the day.
Appearance of the paint would remind wearers to wash their hands at once. Patients could raise an objection if either the bracelet wasn’t worn or there was a spot of paint on the hand of their examiner.