I use one of these. A Zoo Med Reptile Fogger Terrarium Humidifier. Link http://www.amazon.com/Zoo-Med-Reptil...2835759&sr=8-1 Along with this. A Zoo Med HygroTherm Humidity and Temperature Controller. Link http://www.amazon.com/Zoo-Med-HygroT...2835759&sr=8-4 Works fine with a CHE. It'll keep the humidity where you want it. Use distilled water only with it.