I'm not this bad, but it sounds similar. Some strains clone at 95% for me and others under 50%. I've tried a hydro bubbler/cloner and the rockwool. Fucking joke.Some strains like MAC are a pain to clone. Strawberry Cough and God Bud are hard to get to root. Zkittlez and Gorilla Glue are ok but I found with bag seed mothers and weak thc strains are so easy with 5 days seeing first roots. My buddy just bought a cloning bucket online and said he has success. I went to a cloner. A bubbler and then after slime and 100% fail after two attempts I converted it to an aero cloner which failed horribly too. I went back to ph'd rockwool cubes and a heated tray with a dome. This time around I got 3 large trays of clones off for my friends and to fill my flower room up 100% success until the mothers root bound. Now im at 14 days with no roots and yellowing(feeding on itself) leaves and before roots were at 7 to 10 days consistently.
Also would PM on the cuttings slow down the rooting process or kill the clone?? I been spraying the mother plants with IPM treatments before I take the cuts though.