Waves,
The title of your post reminded me about rain.
For a few days I was spending mental energy thinking about how to get clean without showering -- swimming, catching rain, . . . I ran out of ideas soon.

I've decided the problem is the water mostly.
But all the other stuff including what you and others have listed is part of the problem too.

I used to be a real clean freak about myself.
I have adjusted my cleanliness issues in order to avoid the shower. I could go a very long time without cleaning at all if I did not go out.

M.