My tips for successful rooting: 2 sets of lights, 1, 3000k (floro) lighting that is just strong enough to keep the cuttings from dying, 2, 6500k (floro) light that is strong enough to give the clones 2500-3000 lum per sqft; Run the low level(3000k) light until the cuttings have significant amount of roots developed but not enough yet to transplant(usually about 10days), then turn on the "veg" lighting to engage the vegging growth process until the clones are ready to transplant(another 5-10days depending on the strain) My time frame is for the average strain that is relatively easy to clone;
keep the cloning space/bubbler water at constant 76-80f(and not a degree higher);
clonex gel; clonex solution for feeding
Method: find branches along the lower parts of the plants that are thin enough to have soft branches but thick enough to be strong and sturdy, and are at least 5" long and have at least 3 leaf nodes below the crown of growth.
Cut off branches and place in cup of water until all cuttings are taken. Then take cuttings one at a time and remove all lower leaves from nodes accept the crown and 1-2 leaves below that. Pick the lowest node that has some stem below it and(using a clean, very sharp razor blade) cut it off 1cm below the node, on a 45 degree angle. Gently scrape down the stem from that lowest node to the end all the way around so that the outer(tougher) skin is removed, but not too much or too deep into the skin of the stem. Then dip the stem in the clonex gel up above the lowest node, and set aside for about 10minutes before putting into bubble cloner, or put in right away if going into rooting cubes. Snip in half the fronds of any larger leaves below the crown.
Only do one cutting at a time so that the open cut isn't exposed to the air any longer than needed to complete the process. Never touch the cut/skinned end of the stem to prevent contamination. Work in clean and well lit area so as to be efficient in the prepping process.
If using bubble cloner, don't keep opening the lid every day as that exposes the stems to light. Let them do their thing for 5 days before checking for roots.