Humidity Advice

[stonecutter2]

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.

This is correct. Colder air holds more water vapor, warmer air less. The water vapor present doesn't change, the amount held in the air and measured as relative humidity does.