I tried a few times to respond to ur private message, it won't let me i give up.
Good thing you got the humidity correct now
Your trying to root some cuts in a tent, under an hps rite. How far away? Hps is way too bright for cuts, unless really, really, really far away. Remember, they don't have roots yet, your not trying to grow the cuts, your trying to root the cuts. You want a low light level. A t12 fixture 14"-16" away, Is my personal recipe for success.
Oh yeah, remember what i had said about the temperature of the actual cubes themselves. When you pick one up, it should be warm to the touch. Not hot, not cold. If the tray is on the floor, it could be getting the heat sucked rite from them. Ideally, when shit is dialed in, you should see the first roots, on a few cubes in about 8-10 days. If after 3 weeks, no roots, it ain't gonna happen. Take extra, extra cuts until you get it dialed in. Good luck dude