I'm not saying this as some kind of super expert or anything but i think you should give it some time... I've tried, tried and tried, to clone killing many of them along the way. I came to the conclusion that after 4-6 days they weren't rooted or showing any new growth, i asked around and someone told me that i wasn't giving it any time. And told me that it usually takes around 10 days to root. I gave it a try and looked after 10-12 days in the humidity dome and wah-la roots!!! Somebody else also brought something else to my attention,
that roots grow in the dark and that foliage grow wit light... try leaving them in the dark for a few and check up on them in a week and tell me what ya get...