If you are using hygrometers to check Rh, you will need to recalibrate about once a year. Using the salt test or a Boveda kit, check your hygrometers. Personally, I dont rely on my hygrometers, the Rh of the air is irrelevant. What's important is the Rh of your cigars, mine are all in boxes so how they are smoking is my check. Been using Heartfelt beads for 3 years without issues. Keep things simple and you will get more enjoyment out of this obsession.
