Hi,
Maybe you've solved this problem by now, but I would advise anyone with humidity doubts or problems to check the validity of the readings. There is a very easy & reliable way to calibrate a hygrometer using only a small container of salt and a plastic baggie.
Just Google "calibrate hygrometer" and there are a number of places that explain the steps.Most are on cigar enthusiast sites ,at least one in reptile info(About.com)
I've found wide variations in gauges from the same manufacturer placed side by side.
M.
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