That's interesting you say that asp. I have auto misting and waterfall and I presumed that they drank when they bath in the waterfall. They only hang in the mister if they happen to be on that tree at the time the misters come on!
Just an observation, I had one that wasn't as good a feeder than the other, she turned out female and the more aggressive feeder of the two a male.
I'm interested to study them more to see if I can identify different behaviour patterns between the sexes in captivity...
There my favourite herp!!!

Cheers
Scott.