Seriously, nothing. There are practical, pragmatic reasons to be clean. Health-related reasons to be clean are definitely a thing. But there’s no special morality in cleanliness.
Cleanliness is not next to godliness, regardless of the idiom. That so many people buy into that in 2017 is stupid. There is nothing moral about being clean. For proof, see a whole wash of fastidious serial killers.
Meanwhile, anyone who calls CPS—or even threatens to do so on the internet—over something petty is morally bankrupt.