hey i think you should have soak the rockwool in ph 5.5 to 5.8 water for at least 2 hours cause thats what i do and not to be cheap i put a little of the cloning gel in the water while it soaks

you do not have to keep watering the clones cause they have no roots to uptake the water but keeping the rockwool moist and just mist the clones cause it is feeding from the leave and not the roots also a powerful ASS light is not needed you are not trying to make the leaves grow but rooting them(not saying you cant use it) a fluorescent from your hydro store or walmart will do

i will leave light on 24hrs too almost forgot