Humidity problem

Just put a new humidity/temp in my husbands bp's house and it's only reading the humidity to be about 10%,I have the same one in my Bp's house and its showing everything is good .
Any idea why it's not working properly?
There both in 10 gal. both set ups are pretty much the same.
Thanks

It could be broken?
Do you do anything different for the other cage?
What are the temps?
Is the main heat sorce a Undertank Heater? Or light? lamps tend to soak up the Humidity

The only difference in the other tank is that Keegan has a under tank heater and the other one hasn't gotten one yet,But this is the first time i have had this problem.
They both were in a open room with a small heater going threw out the day with the lights on.
Now there in my closet with there day lights only but i change to night on time always .
Keegan's is showing a little over 80 with 50% humidity
and Dexter's is showing over 80 with a little over 10% humidity.
Before i had perfect temps and humidity for Dexter.
Im thinking about switching the gages to see if it will register for Keegan's house and maybe then ill know if it's broken.
With Dexter being so big i don't wont him to suffer....
Thanks for all help

Try switching the gauges and see what happens. Then you'll know if one is broken or if your humidity is really the problem. Will only take 30 min to find out where the real problem is.

I just switched them over to see.... Playing the waiting game now.

maybe you could try getting a UTH that may help?
I use to use bulbs and it soaked up all my humidity.
good luck!

Well so far its the doing the same in Keegan's house.
Guess it may be broken after all.
Once i get a new one in ill keep a eye on it to see if it's doing the same or not.
Thanks for the Help!