J.B.
I prefer a steam vaporizer. I kept one in my daughters room and ran it any time she was asleep, summer or winter. It was up high where she could not put her hand in front of the steam vapor and I unplugged it the moment she awoke. My problem with the humidifiers is that they must be carefully cleaned to avoid a different set of health issues because of the lack of heat. We tried the cool mist humidifier for a short time when she was older...just for a cold and did not feel it did the job as well as the vaporizer. Plus, the vaporizer allows you to add mentholatum in different forms and carries it through the room.