Originally Posted by
craig
Really sounds like the seal isn't there. The dollar bill test doesn't indicate a seal in low RH winter conditions IMHO.
I'm not sure what kind of humi you have, but with my desktop humidor, I'll put a heavy book on top (lid) to help the seal work in the wintertime (MRN is perfect for this). I only have to do this in the wintertime. If I forget to put the book back on, then the RH will drop.
Note that if your humi's RH really is 38% or was 50%, it'll take a few days to get to about 64%, but each % of RH after that will take a week or so.
The best long-term solution is probably active humidification, e.g., a CigarOasis or Hydra.
Good luck!