Dead bamboo is lousy for high humidity environments... as you just found out.
![Stick Out Tongue](http://www.ssnakess.com/forums/images/smilies/tongue.gif)
Stick to corkbark, ghostwood is great if you can find it. I use live plants for my phantasticus, when they were in quarantine I used hydroponic "creeping jew" cuttings. That type of plant is excellent for providing climbing surfaces, just root it somewhere near the top of the enclosure and it will spread out/down, creating pathways just like a network of bamboo branches. I kind of got sidetracked there, but my point is that live plants make great climbing surfaces and maintain humidity without having to over spray the enclosure.
Btw, have you taken your phantasticus for parasite work-ups yet?