How can I confirm the accuracy of a humidity gauge? We had 1 temp and 1 humidity gauge. We picked up a second so we could monitor the cool side and basking side. The original gauge has been showing 20 %. The new shows 60%. We thought the difference might have been because one was down by wood chips the other was up by the screen. So I set both gauges next to each other. Still have readings of 20 and 60%. Thanks JJ