Here goes cloning made easy, this really isn't rocket science, don't make harder or do more than you have too.
1. Select your cuttings, I like about 3 inches of branch to work with. Just make sure that your branch is stiff so that it won't rot in the rockwool before rooting.
2. Take your cutting, making the cut with a sharp sharp pair of scissors or razor blade. I suggest wiping them down with alcohol first.
3. Place your cuttings in a bowl of water immediately, submersing them in the water, I like to add a drop of superthrive to the water but this is personal choice. Leave in the water for about 15 minutes, this ensures you don't have air in the stalk.
4. Take cutting dip in your root toner, be it gel or powder, cut the bottom of the cutting at a 45 degree angle. I cut after dipping to make sure that the bottom of the stem is clean to allow the water to be more easily drawn up the stem.
5. Place in your wet rockwool cube. People have different thoughts on this but I simply wet the cube place in the cutting and squeeze out excess water. Some say you have to presoak for a certain period of time but I have never found this to be helpful or harmful. Most commercial rockwool is Ph nuetral so I see no need for the extra forethought.
6. Place cuttings in a tray of somesort under a dome atop a heating pad, dsl modem of other low heat source.
7. Place this under your light source, I have great success with a simple 23 watt cfl and have cloned up to 12 at a time in this manner.
8. Mist daily, ensure the rockwool doesn't dry out and allow the dome to come off at least once a day to have good air exchange.
This is the method and steps I take each time I clone and haven't lost a clone in well over a year.
Hope this helps and Merry Christmas