Thanks Albert. My humidity is 65%, he's caged in a T8. Has a bowl of good clean water plenty big for him to soak in but I've never seen him do that.
Going to try a small f/t rat again tonight. I have some f/t adult mice for my daughters corn snake but I hate to open that barn door. My daughters little Mohave is in deep blue so if she refuses tonight I may try giving Walter her fuzzy rat.