Learning by experience opinion, 50-60% RH normally, 24/7 ... 60-70% only when eye caps show or they start to grey up for shed. Make sure the bedding isn't "wet" too. No condensation on the sides of tubs/glass. Make sure the substrate isn't "wet" ... moist is fine; like the herptopia coco husk ... not cheapy husk.
If you are really worried and see no progression with the above changes ... vet, vet vet.