I cloned mine with side branches, have 10 good ones too!. I waited until at least 4 branches started up the main stalk, clipped the bottom one so not too much stress on the plants. Just clip, dip them in cloning gel and stick em in a medium. I use these organic plug like things., They look like a peat pot but they are more moist and the roots are easy to come through them. Put them in a try and uder a light. In about 2 weeks you should see some roots. I mist mine daily too with just distilled water, and check the moisture content as you don't want too moist or the roots will go rotten.
Good luck,
Chiceh
