My hygrometer is really good. I got it from an avian supply company and I tested it a few times.
I'm thinking about just getting some more small Rubbermaid lunch boxes, some more 8 gram Bovedas, and using those and forgetting the humidor altogether. It's getting to be too much of a pain. I'm also looking into HCM beads because they work differently from silica beads (they don't have a specific RH that they are conditioned to work at). I still like the fact that beads absorb ammonia, it definitely improves the cigar smoking experience.
I'm using Cigar Mechanic beads. If you directly wet them, they start to pop and fizzle and later, make dust everywhere. So I'm using it along with other humidification so I don't directly wet them. They are mostly clear looking with a few that are white.