Remember that your hygrometer measures "relative humidity"....
Do you have a hygrometer that sits outside of the humidors to tell you what your humidity in your new place is? Grab a cheapie at Wal-Mart or the local hardware store, and you may find that your new place has higher relative humidity than the old place.
At work, I can watch the humidity change in the drawers of my storage unit with even the slightest tempature change (someone holds the outside door open for a few minutes, letting the cold outside air into the office)...
That's all I can think of off the top of my head.....