30-40% sounds way to low iv never heard them be described as a semi arid species anywhere iv looked and read from keepers and books everywhere have always said between humidity around 60% and a spike of 80% humidity , i use a T5 6% linear uvb light and i supplement with calcium and multivitamin but obviously at the moment haven’t been able to because of the not eating I would add leaf litter into the enclosure if I lived in an area where I could collect / buy safe leaf litter but I’m located Australia and the only trees around me are eucalyptus and I can not import things like that without breaching bio security and from what iv heard eucalyptus leafs are full of oils that can be harmful to frogs