Ugh... I'm dismayed to report that the corn still hasn't shed but is closer I think... my sister's source said that corns don't need any humidity period... I read that they needed between 40 and 60% in one place (I read the care sheet here though, her source was right...) since he's trying to shed anyway I did put a modified tupperware thing in the tank over some damp moss so he could get his humidity fix if that was what he needed. He went straight over to it and checked around it some before retreating back under his water bowl again.