^^As for the technique, after you cut the cutting off the plant, put it in water and cut AGAIN under the water. Like, just cut the end off the cutting. This prevents air from being trapped in the stem, as the hole is filled with water right away. If air is caught in the stem, the clone won't do very well and may die. It's called an embolism, and i believe the clone dies from it because the plant can get an internal infection within it, and the bubble (embolism) will prevent transfer of water and nutes from the soil to the plant. Also, just have the clones under dim light until they root. Too bright of light will have the clone focusing energy on photosynthesis and not making roots. You should also mist daily, as you said, but make sure the plants get some fresh air for about 5 mins once or twice a day (more won't hurt either). If you use a humidity dome, just remove it for 5mins and sort of fan the plants with it. Everything else about your technique sounds good