I have built vivariums for dart frogs which obviously maintain very high humidity. Once their are set up, you experience a mold bloom which eventually goes away.
I am no ackie expert but I am not sure you want to maintain constant high humidity with them. If you are getting a mold bloom with a herp enclosure, I agree you need to increase ventilation and give the enclosure a dry period during the 24 hour cycle where the humidity is allowed to drop and the enclosure is allowed to dry out. I glanced at a few ackie care sheets and none suggest constant high humidity. I keep chondros and have kept emerald tree boas. These require high humidity but even with them, constant high humidity can lead to health issues.
Good luck,
Bart