Clear roots are dead roots. Sounds like its too wet. I've been battling with overwatering my cuttings since day 1, so I've seen my fair share of roots dying. I think its one of those things you just have to learn, and try to survive until you get the hang of it. They need so very little water...you have to ignore your instincts a bit.
Also, I've basically said screw the humidity chamber at this point. I kept many of my cuttings in one for awhile, but as I got lazier and more frustrated shuttling plants in and out of the humidity chamber based on roots and leaves, I discovered that they do great if I just pot them up after I see roots, and say screw the humidity chamber. Other than my tendency to overwater (seriously...its awful), they've been doing great without the chamber. I rather like the idea, because it forces the plants to cope with lower humidity earlier, which means no weaning them from humidity later on.