I can't seem to find a GOOD hygrometer. By "good", I mean I want to be verifiable, two or three of them read the same numbers when they're in the same location, etc. I've got two ZooMed Hygro/thermostats, and none of the hygrometers I've tried agree with it. (Nor do any of the hygrometers I've bought agree with EACH OTHER. heh. So basically, there's no way at all for me to tell which ones are broken, which ones are good, etc! My hygrostat might be broken, who knows? Can anyone recommend a tried and true, proven reliable and long lasting hygrometer? Thanks!