My humidor I got back in late summer will not ever go above 65% even with a 75% Boveda 320. I felt it was time to do something because I hate not being able to control whatever RH I want. I looked around the back half of lid near hinges and was seeing a 1/16” gap all the way around back half of lid. Got my Little dremel tool, removed hinges and did some work to where they seat. Now all my gaps are gone, lid seals up good with no gaps, now I’m gonna give it time to see if it comes up.