Hey,
High humidity or not, if given a large water bowl, they will choose to soak. They have their moments when they soak for long periods at a time and then go for long periods where they don't. And in my experience with soakers, I've not found them to be adversely affected by it. So whose to say otherwise if they are soaking too much, or not. If you don't see or notice any unusual skin blistering from soaking or any other adverse affect that might be attributable to soaking, then I wouldn't worry about it; they are doing what comes natural to bloods and short-tails.
Even with a small bowl, the red female is attempting to squeeze her self into her water bowl. The black female, Negrita, obviously has a larger water bowl, and fits in it quite nicely, much to the chagrin of her red-blood counterpart.


-Angel
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"Until we lose our self, there is no way of finding our self."
-Henry Miller.