Quote Originally Posted by Kidvegas View Post
Question? Are you using a fresh boveda for calibration? I've never had success with the calibration packs. Always grab a fresh boveda close to my preferred Rh and throw in bag with hygro. Has worked every time
Same here. I toss a new 65% Boveda pack and the hygrometer(s) in question into a quart mason jar overnight and see what they say in the morning. It's important to keep the temperature constant. Any temp will work but it has to remain steady for the rH to stabilize. A Mason jar works better than a bag IMO, even with a used sealing disk.