Eastern latrines: the water and the dipper. Very informative!

https://www.youtube.com/watch?v=dKkryfdtMNQ

> To clean the sponge, they simply washed it in a bucket with water and salt or vinegar.[2] This became a breeding ground for bacteria, causing the spread of disease in the latrine.

Seems like we might not want to switch to that anytime soon.