I have had good luck combatting low humidity by watering my catts EVERY DAY and using a light bark mix and an aircone pot to make sure the roots don't get soggy. I also keep them very warm to also combat rot.
I am impressed! How do you keep your indoor humidity high enough for the species in Idaho?
In Pennsylvania, my indoor humidity almost did my catt species in
D, I don't do anything to raise the low humidity. S/H works very well for me with the low humidity in the house.