Ok so I have 6, yes 6 hygrometer in my bathroom. Forced air...Styrofoam. my issue is that the two in the middle have one temp. 99.5 or close to it at all times. But the outer ones are showing around 102 (which I do t like. One of the middle ones is exactly the same as the outer ones. It does have matter which I put where the Temps show the same around the outer edge. Is this because the heating element. Is near/above the outer ones..