I recieved a Binsea Octagon Eco for Christmas I also got a digital hygrometer ( $6.00 cheapie at Walmart) I calibrated it twice. Once I just dumped a 1/2 cup of table salt in a cup, and then added 1/4 cup of water and sealed it with the hygrometer in a bag. I forgot to stir The Hygrometer read 63% Then I came home, stirred the mixture and dumped the contents back in the bag, put the hygrometer in the bag, and sealed it. My next eading came in at 60% Humidity What did I do wrong? Is it possible for the hygrometer to be off that much?