Yup thats right!!! Waterfalls and standing water get polluted with poops and stuff and then bacteria begins to thrive in the water and once your cham is thirsty enough,,,,it may start drinkin from it and thats not a good thing!!!!
I have both going in my cage,,,,,a mister twice a day for between 2 to 3 minutes drpending on the humidity and a dripper going for the most part of the day,,,,the water dripping on the leaves and making its way to the bottom along branches is more enticing to chams than still water!!!