I am not sure how your set up is but I use melamine racks and I used a dremmel to notch out where I put my probes on the shelves. I put the probes in the notches, then I tape the probes wire down with heat tape (which is partly notched out also), then I put my flex watt over the probe and lastly heat tape the flex watt down..
Hopefully your snake can not get to the duct tape?