Hey ExoticGrower, I have made thousands of clones so you are at the right address :)
You should only clone when your plant is in growing stage and not in flowering stage.
They can be cloned after being into flowering stage and pushed into growing stage again but that is some pro stuff not everyone can and understand.
Why do people do that because they started buying seeds, saw which plants grow fast, flower nicely with good colors and they choose that plant to make lots of clones to sell and grow themselfs.
But back to cloning from growing stage.
1. Make sure you got some nice mothers that had a nice grow
2. Only cut of clones from the upper side of your plant, not from below, these are weak and tin stems.
3. Before cutting of clones, make sure you feed your plants with grow nutrients the day before with max 2 days.
Why? because your fleshly clones will have some decent nutrients in it.
4. Dip them in special clone powder.
5. Make sure your rookwool is wet with ph 5.8-6
5. Put them in like rockwool, not to deep not to high
6. Cut like 50% away from all the leafs because thoose leafs are heavy
7. Expose them with TL light, i gues LEDS can be done as well but i like TL. With TL you can put it like 5-15CM away from the plants.
8. It is usefull to have a little clone tent for this
9. Keep the wool wet but not to wet
10. You can spray your plants as well with normal ph 5.8 water or some leaf-spray( when you do that, they can stretch but you really want them to root)
11. Wait like 10-16 days and you will have lovely strong clones.