I got my first humidor today (was an early birthday present from my wife). It's a smaller one - fits maybe 25 cigars. Anyway, I filled the humidifier with distilled water and shook it out real good - just made sure the sponge is nice and damp. Then I put the hygrometer on, closed the lid and have been waiting. So far, the hygrometer is still reading zero. I know it's supposed to be 70% humidity. So, does it just take a while, or do I have the hygrometer in wrong?