Some balls like to soak, simple as that. It depends on the individual animal. And when I say soak, I mean for days.... not 10 mins. I have a handfull of yearlings that soak before shedding. And a few that soak even though they are not ready to go into a shed cycle, they just soak. And a number that just don't soak at any point! The tubs they are housed in are often fogged up, so no it's not a humidity issue.

I have noticed that this is with yearling sized ball pythons however, I have yet to have a juvie that soaks.

Here is a pic of one of our pastels soaking before a shed.