Re: RH drops from 70-71 to 63-66 when opening Coolidor.
It should be noted ... scientific instruments are NOT accurate 30 days after their last calibration .
When I worked in the oil and gas industry ... measurement instruments had to be calibrated every 30 days or they were not considered valid for sales .
So ... no matter how expensive or high end your hygrometer is ... it is only an approximate RH .
derrek
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