Quote Originally Posted by Brimy View Post
rH is just that, relative! So yes, you will get the % change with the change in temp, but (if I'm not mistaken, fellow BOTL chime in) the amount of moisture in the humi is still the same.
If you haven't I would check the seal around the glass, I hear that is a common source of rH leaks.
Understood. Yeah the RH drops at night but I don't think there is a leak because when the temp comes back up during the day so does the humidity. I'd be concerned if it dropped at night and then at the peak temp of the day the RH was lower, but it bounces back right where it left off the day before.