Now, a teenage developer from the U.K. named William has created a tool that will make you a hand-washing how-to poster accompanied ... another popular option for hygiene karaoke, to "Shake ...

Rage Against the Machine are one of the many bands who have tweeted a poster created by the site. Credit: C Flanigan/FilmMagic If you're getting fed up of being told to wash your hands for 20 ...