im a newb so i would wait for a second opinion, but from what i understand you want humidity anywhere from 50-60% untill the last two weeks of flowering then you want to drop it pretty low like mid to high 30's but you wanna take it really slow. The drop in the humidity makes the plant protect itself with extra resin causing the final product to quite frosty. you wanna keep the humidity as high as possible to reduce the salt levels in the plants tissue.