yeah I used roottech (the technaflora product), also soaked the Rapid Rooter plugs in Root 66 and some B1. I've been spraying them with really weak B1 for the last 2 weeks. I'm pretty sure I did everything right when I cut them. I cut them all at once, put them in water right away, 45 degree angle, a couple 1/4" slits down the side, into the gel, into the plug. The first dome I had didn't seal very well and dried out really quickly, this dried the plugs out pretty quick too. The humidity was not where it should have been. I picked up the new dome and the heating mat on day 7 and have been using it ever since. They look really healthy aside form the yellow leaf tips and NO ROOTS! What's making them yellow?