You can maintain cleanliness with or without hair. Wash every now and again when it's important, like say daily showers, before/after sex, and so on. My choice to shave was not based on cleanliness or appearance. My pubic hairs where rather thick. Not having them there makes oral sex more enjoyable for my wife.
Also if your crotch stinks so heavily after a day that you feel the need to shave to help keep the stink at acceptable levels because it bothers you, I think there are other things at work here.