I clip the clone from the lowest branch possible. I slice the end off diagonally right below a node of some sort. Cut this bottom node off close enough as to slightly skin the side of the bottom of your stem. If they aren't already wet, put root cubes in a bowl of mild temperature tap water, take one and squeeze it out so that it is still quite moist but not soaking. Dip end of clone into rooting product and stick it into the premade hole of the root cube. Put into tray with humidity dome and seedling heating pad. Pour a little bit of water into the bottom of the tray and spray the inside of the dome with a little. Try not to directly water the cubes or spray directly onto the plants if you can avoid it. I like about 80 degrees inside the dome with high humidity, for me this requires the seedling heat mat. Do this properly and expect roots in 4 days or so. If you keep them too wet they wont ever feel encouraged to grow roots to seek more and they will likely dampen off. This is just what works for me.