Matoran Cleaning Facilities?

Hey Greg, there is a thing I’ve been curious about. I can imagine that a lot of the Occupations the Matoran had on Metru Nui would often result in a lot of dirt and grime on their bodies. So did they have a washing facility somewhere in the city or were they fine with being dirty?
If yes, did they have one in each Metru, or was it located exclusively in Ga-Metru, for obvious reason.