Consistent Rh from top to bottom is not as important as one might think. What is important is that your cigars smoke as you like them. Your not smoking air, take some readings in various boxes in different places. The Rh inside your boxes is whats important. If your top to bottom Rh varies by less than 10% you should be fine. I rarely even look at my hygrometers any more, one Vino and a couple of coolers dont even have working hygrometers. I only use 65% Heartfelt beads and things have been fine for 4 years.