Moisture wouldn't be steady enough if the box isn't broken in. If you can, go buy a little digital hygrometer. That is a for sure way to know. And they can be had for under $20 (us) I have two of the little habana cigar shaped hygrometers. They are awsome and well worth the money. I actually used it to set up the analog hygrometers in one of my humidors, hehe. Very nice humidor by the way. I love the different trays.