I am having trouble with the stability of temps in my rack system. i understand thats it winter in NY and its obviously cooler in my room. but i have the helix set to 90 with the probe taped to the heat tape on the middle shelf. the problem is, its always on cuz it will never get to 90 in that spot because of the temps of my room. its not that cold either in my room. i dont have an accurate temp but its around 65-70 in the room. so when i use a temp probe in the actual tubs, the spot directly over the heat tape has gone up to 103 and i know thats too high, and the cool spot goes down to 77. should i place the helix probe inside the middle tub so the temps are more accurate inside the tubs?