Hello. You can control your rh by removing fan leaves. Try removing 5 large fan leaves from each plant and check in a couple of hours what your rh is. Your trying for, 45% to 55% through the day (lights on) and no higher than 65 at night (lights out). If you open the tent in the morning and its 67 you need to remove some leaves. Please don't take all the leaves off, the plant needs some. Good Luck. Chuck.