I haven't kept chameleons since 1979...so the advice of these senior members should be taken. Just recently, I aquired one again. My experience lies with iguanas, snakes and water turtles. My iguana experience taught me the importance of weekly baths for shedding and wellbeing. But that is a tropical high humitity species.
If misting the chameleon itself...directly... is needed for eye and skin health, then does an auto mister really do the job over an auto humidifier? Both provide a "shower" if you will...into the enclosure. The humidifier is water in a less solid form, but does provide alot of moisture.