I purchased a Exo Terra digital hygro/thermometer off the net for my tank after I got my darts. I wanted it because it has a nice little sensor that's easy to hide. the digital sensor I had before worked good and my tank was reading 70-80 degrees and 70-80% humid. Now for some reason for the past few weeks the sensor is reading anywhere from 50-90 degrees sometimes and humid as low as 60%. I keep my room temp at 70-75 all day and have a thermometer in the room. If I wipe the glass off the front doors in my terrarium they start to fog as soon as I close them so im assuming the humidity is closer to 80%. These are my first dart (R. Imitators) and they both like to just hide up in the top corner behind a large branch almost all day, especially when im in the room, im assuming that this behavior is normal. Anyone have any ideas on this? Maybe a bad sensor? If so is there a way to fix it?