1. Retest our Hygrometer. Salt test to see how off it is.
2. Check the location of the humidifiers. If it's right against the Hygrometer, you will get a higher reading.
3. Definitely upgrade to beads. If your hygrometer is still off, then it's broken. Beads are dead on. Just keep the beads clear (leave some white, so it can obsorb excess moisture).
4. Leave no space. Fill your Humidor with as much cigars as possible. The closer you get to max capacity, the better the humidor will keep it's RH.

Good luck.