Product review (3 stars): Not sure that it's working correctly
I'm not sure if this item is working properly.  when we have it outdoors (In Indiana in the summer) the humidity level registers around 40-45%.  (on extremely muggy, humid days).  but, when we take it indoors, into the cool, dry Air conditioning, the humidity guage jumps UP to 65% in the screen.  There is NO WAY that our cool, dry, air conditioned house is more humid than the outdoors in the summer here.  I wish it could toggle between Fahrenheit and Celcius, but I can live with that.  I just don't trust that the humidity guage is correct.