Quote Originally Posted by DVirginiana View Post
If they're both for seven dollars, they're probably the more inaccurate kind... But go ahead and put up a link just in case you ended up with an amazing deal. A hand-held laser thermometer is the most accurate. They're like twenty dollars at Petco and they last a long time. The ones you stick on the side of the tank can be off by like seven or eight degrees.

Yeah, if you haven't had a thermometer/hygrometer in there I'm betting that's your problem instead of scheduling.
this is what i found
Amazon.com: Reptology Reptile Hygrometer Humidity and Temperature Sensor Gauges: Pet Supplies

Amazon.com: Zoo Med Economy Analog Dual Thermometer and Humidity Gauge: Pet Supplies