Not sure how retics go but with my blood I put the water dish over the hot part of the cage (its a large one so he can fit). And make a humid hide filled with tons of moss. After he sheds I decrease the moss or totally take it out, depending on time of year etc and he does fine. As mentioned above sometimes a large water bowl over the hot side is enough for the little guy. I also keep him in a tub like my balls and he does great. Though few things cuter than a blood chillin in the bath tub.
My little guy has the best temperament too more chill thn all my balls just sits and I can do whatever needs to be done to him. I bought him at the New England Reptile Expo from NERD and they sexed him in front of me and he didn't even flinch just kind of was like .. whatever.