So, we've built a new rack and got a new thermostat to go with it, but we're having a bit of an issue. The thermostat is set to 89, but the inside of our test tub is showing 97. This seems to be caused by a small gap between the probe itself and the heat tape that no amount of fiddling has been able to eliminate. Currently, the probe itself is open to the air with a piece of duct tape across the cord leading to the probe to hold it in place. Would it be safe to use a piece of duct or electrical tape across the probe to make contact with the heat tape, or is there another resolution to this? We didn't have this issue with our last rack (the probe is positioned using the same method, and lays smack against the tape), so I'm hoping for the voice of experience to give me a hand here.

I did read this thread but there seemed to be some back and forth going on there, with no real solid answer.