I need help with my UTH I put my probe on top of the aspen it reads 94F and when I lightly cover it it sats 95 then when i put it under the tank directly on the UTH 97. Then when I brush all of the aspen away so only the glass bottom is showing It reads 95. This is where everything goes wacko i peeled off the adhesive part on the probe (the thermometer is Accurite) and stick it to the bottom it says 107F. Which one of these are right?