There is a lot of bro science out there when it comes to cloning weed. Some proven and some not... TBS the greenhouses that I have seen produce clones, clone under a constant mist system that mists plants on a timer, several times a day. No domes, no nutes, and plenty of air movement. That's the benefit of having a greenhouse. The way you prepare a clone is also important, as is the media you use. Whatever media you use put about a inch layer of perlite on the bottom. This helps with drainage, and air movement. Environment is the most important factor when cloning. Temp 80, humidity 80 plus, with some air movement . T-5 lighting works well, as does Mother Nature . The pic I've included, is of clones taken 3 weeks ago, kept outside mainly in shade, and watered daily with the spray nozzle of the garden hose. They're ready to transplant !