I seem to be the only one who doesn't-lots of threads I've seen in the past seem to have 50% of parents showering at swimming pool, with the other half talking about bringing them home and throwing them in bath or shower.
I do neither; they get dressed (onesie and pj's in winter!) and come home, and later go to bed without showering.
In my defence, they all have good skin and strong constitutions so I can't see any outward effects of this, but equally I'm prepared to be told if im being dirty/unhygienic.