Just went to the 'Wash Your Lyrics' site;
https://washyourlyrics.com/ This will generate a 40 second hand-washing bite of your favourite song/songs if you can't abide 'Happy Birthday' for one more wash... As a result, my new anthem is 'Stayin' Alive' by the Bee Gees, because the hand-wash ends with "You're stayin' alive, stayin' alive...", which I decided was fortuitous and funny.