As I've said, misting and spraying the substrate has not maintained the correct humidity inside the enclosure; even if I were not aiming for a higher humidity, misting hasn't been able to maintain 50% humidity at minimum. I am using coco substrate, but it's losing moisture faster than spraying can replace it, and I'm not comfortable fully saturating the substrate whenever it gets too dry. I'm looking for other methods of humidifying the air inside the enclosure.

My vet recommends 80% humidity because that is what ball pythons are exposed to in their natural habitats, and the goal of exotic husbandry is to mimic those conditions as closely as possible without causing risk to the animal. I trust my vet's experience that 80% is not hazardous.