so do I piut my probe from myReptiTemp 500 on the UTH outside under the tank and if so how do I attach it to the UTH? Or do I put it on the glass inside my tank under the aspen?I also have a temp gun and it said snake Body temp was 79, top of aspen 75. both with gun. But my digital therometer whicih has the probe just hidden under aspen almost on top is showing 85-91 range please help