Hello, I'm getting my first BP shortly and bought a lone ZooMed thermometer and also a ZooMed thermometer/humidity gauge. However, they read 5 degrees different when right next to each other. Are the ZooMed thermometer's not to be trusted? Does anyone know of any really good thermometers and/or humidity gauges that are wireless? (I don't want to cut holes in my lid for the wires)

Any help would be appreciated! Thanks!