You're supposed to wash your hands for 20 sec, which is the time it takes to sing Happy Birthday twice. But I'm tired of singing Happy Birthday and you probably are too, so I've done the very important public service of compiling other songs with roughly 20 sec choruses to sing:
Winnie the Pooh never made fun of Eeyore for being sad. He never wrote him off as being crazy. He invited him on every adventure even though he knew that he might say no or be grumpy. He understood that he was the way he was. We should all be a little more like Winnie in 2020.