tunes and tricome.
i have had great success with cloning (100%) for some time now. maybe I can offer some good advice. . . there's no way you should be losing 2/3 of them
1)get a good humidity dome with a raised tray and a tall dome. shouldn't cost you more then 10 bucks. this is so you can keep water at the bottom of the tray, and therefore it will always be very humid, but the medium never sits in standing water. this is very important and cheap.
2)prepping the RW cubes is all important!!!! fill your dome tray 1/2 way with water, and adjust the ph to 5.0-5.5. if your not using RO water, let it sit for 24 hours. also add some cloning solution. i use clonex, but i don't think it matters much which brand. i use some hygrozyme too, this will make sure the r zone is healthy. fully saturate the rw and let it sit for a little while. then drian some of it the water out of the tray, enough so that when you put the raised tray in it, the cubes are not submerged.
3)make sure that the rw cubes go through complete wet/dry cycles. dont let it dry out completely, but 80-90% is pretty dry. it should take days.
4)mist them frequently with water and a foliar dose of cloning solution. 3-4 times a day at least, if you can. 1-2 is still adequate.
5)leave them alone as much as possible. they are going to concentrate all of their power into growing those roots, doesn't help to be jostled around.
6)try to keep hem between 70-80*F.
7)if its not warmer than 80*F out, then a rooting heat pad will help them root faster. they like it very much when the root zone is a few degrees warmer than the air. plus with the raised tray and the water on the bottom, it will be 99% rh in there for sure.
if you can get all of these conditions down, i promise you over 90% success rates.
gl guys, these are just a general rules, not specific for anyones case.