I alternate between showering and strip washing.
I've fairly recently moved into a complex of supported living flats and am conscious not to disturb other residents as few human beings - and none here - get up as early as I do, 04:30.
I try not to shower before 07:30, by which time I know others are up, and never before 7 - if I need to be up and out earlier, those are strip wash days.
Mostly it's a relatively quick in and out but on Sundays, I wait until about 8, and then go and luxuriate. One of the best things about this place is the massive, hot and powerful showers.
I wash my hair every other day. It is fine and sparse, so the least hint of grease and it claps itself to my scalp, a look I don't have the bone structure for.