I have a trust issue so I always quarantine new sticks as a safety measure. I have been told by a couple of manufacturers the primary reason for the below 70 is to hinder hatching of the beetles. But too high of temperatures will also cause damage to the aging process and cause bitterness/sulphur tasting smokes. After about 10 days at 75 to 80 and no beetles then they graduate to the main humi. I keep both quarantine and main humi at 65 to 67% RH.