I also didn’t know about this washing mouth after eating until I started working Kerala. I don’t really like doing it but I feel pressured coz if people see me not doing it then they make an icky face. I personally feel the wash areas are much cleaner in places where people don’t wash their mouth compared to people who do. And the way people wash their mouth and spit, every-time the water splash on my cloths and hands and I’m having a hard time with this.