I have one pastel female that loves to soak during her shed. When she goes blue she goes in her water bowl until she sheds. Even though I get the humidity up to 75-80% for her. I could have sworn she had mites but no she just likes to soak.

Between sheds she is never in the dish...

I don't have a ton of snakes so I don't mind giving them a bigger dish when they go blue. But the little ones like their humidity hides the best. I make a hide out of those hefty snap together bowls and put in damp spagnum. Then they shed and the spagnum dries out till next time. The perfect hide.

This is what the bowls look like...