I clone ok..
First...soak the rockwool for 24 hours in water that is ph'd to the low 5's...they say on the package 5.5....but shoot for runoff of 5.5-5.8. My tap water is 20 ppm and 6.3 ph...so I know how to get it to where I need it. You may have to play around to get your runoff correct. Its ok....just keep dropping/raising the ph of your water until you get there.
Make the cutting about 5-6 inches long, cut the stem with a new clean razor at a 45 degree angle. Remove with a pair of scissors all the leaf set except the top 2 or 3. Cut the tips off the fan leaves that are left...about halfway. Drop it into a jar of distilled or filtered water that is ph'd to 5.6ish. I like to leave them there 24 hours.
Ok you got a jar full of cuttings. And some rockwool that is wet.
There are many rooting products. I use a blue powder that is IBA. (indole butrylic acid (sp?) Its just what they had.
Hormex is good, but its a liquid dip. I like powders and gels. Then theres the high dollar stuff. I have gone both routes...IBA is good and cheap.
Assuming you have a store bought tray and humidity dome for your rockwool...
I like to roll the cuttings in the powder about 2 inches up from the cut and stick them in the rockwool. I usually dont take a stick and open the holes in the rockwool like alot of cats do. After the 24 hour soak its usually soft enough for the cutting to slide right in.
Repeat 50 times. I like the 2x2 cubes.
Ok ...mist them off with plain water and cover them with the dome. Leave all the vents closed for 24 hours and then open them up about 30% daily...for 3 days until they are wide open on day 4. During this 4 days it is important to take the dome off several times each day to allow fresh air in/bad air out...."burp them" several times daily.
Day 3...foliar with (per gal) 1 oz good liquid kelp, quality humic acid.
Day 4 soak rockwool with water ph'd the same as the water you brought the ph of the rockwool down with.
Day 6 same foliar
Day 7 same rockwool soak.
Day 8-10 Roots
I just did this the other day for fun...I was using it to mark a tray and it got roots.