Thanks for sharing the storyI have my wife check a couple times a day while I am at work as well. My best advice is directly on the heat tape and get the probe off to the side the best as possible to make sure tubs etc do not knock loose. The electrical tape is a great idea. Secure the sucker down, I personally do not tape the probe totally under the tape, i think this allows that area to give a false heat reading, I let the front tip of the probe be free from tape.
In aquariums I had really good luck hiding the probe in the hide under the bedding. This requires some attention but for the most part worked very well. I have seen probes on sides of tubs and aquariums and this does not give a true temp reading where we most need it, and that is the surface reading where the ball python lays.
It does no good to have a 94 tub bottem reading and then put paper, aspen or bedding of choice so thick that their belly heat is 86...Anyways I am getting off topic lol.