rooting hormon has to be used correctly, don't cover your stem in the shit, just touch 1 small area on one side of the stem with the stuff, otherwise it decreases the chances as it can clog them up. another good trick is to make the 45 degree cut by razor blade under water. a soup plate full of tap water works great, been making hundreds of clones over the last years and i have gotten to the point where i have 99% success rate. i use hormone tablets that are dissolved in water, then i will dip my clone stem in that water before sticking it in the aezy plug. i also remove all branches and leaves except the top, will cut those leaves right back too, so it has a very small amount of leaf left. i find they root more consistently, as leaving the leaves whole, causes them to shade each other which slows the rooting on the shaded clones.