If it ain't broke...

I'm looking for some input on a situation with my humi. A few months ago I won a "chancellor" humidor on cbid. I seasoned and got everything just about the way I want it. I currently have the Hydra LG with additional fans along with 24oz of shilala beads in the cabinet. My problem is that I noticed the hydra was needing to be refilled way more often than it should. So I decided to put foam weather stripping around the door to get a better seal and keep some of the moisture from leaking out. This is when the humidity started spiking, even with the hydra off the humidity was around 75%. Does anyone have any idea why this would happen? I have since removed the weather stripping and the humidity has dropped back down. I just don't understand why it would do this, is the cabinet better off being "leaky"? Any input would be greatly appreciated