Product review (3 stars): Indoor Humidity Not Accurate
I'm not sure if this one is going to work.  I bought this for my father a couple of weeks ago to replace a much older AcuRite digital thermometer that was failing.  It was easy to set up of course, but I have a bad feeling that this is a bad unit, for the indoor humidity is stuck at 29% which doesn't line up with a manual humidity gauge sitting next to it.  Were it that low, there would be frequent static shocks from the carpet as well as a few nosebleeds.  The outdoor temp and humidity appear to be just fine and the indoor temp is also accurate.  It's just the humidity indoors.

I think I will remove the batteries to 'reset' it, if that is even possible, then set up again and see if that helps.  If not, I suppose it will go back.  Then will raise or lower the rating.