I have Kenyan Sand Boas and I am having issues keeping humidity down. Its sits around 60-65%. I live in Washington and with the warmer weather the humidity has gone up.

I have them in a rack with belly heat (flexwatt) and use a VE200. I use sani chips for substrate, and the tubs have holes added for better ventilation. I have them in my bedroom because it is the 'kid free' zone. I have a ceramic heat emitter across the room to boost my tarantulas and it helps a little but I have to turn it off on hot days.

Are there any tricks I can help to lower it in the tubs? If not are there any tricks to lowering it in the room?

Thank you!