Mj grows best with the RH level up to 70% during vegetation and lower it to 45% after the first 2 weeks of flowering to the last 2 weeks. Then you take it down below 40% for the finish. You should use a humidistat and thermostat to control the climate. The problem with using home misters (like for sick kids) is they take to long to warm up and that makes it hard to keep an exact RH range.