I have 2 CB70 4 tub RBI racks. I have a Helix thermostat.

I have the thermostat probe taped directly to the flexwat like I am supposed to.

Problem is that I have used both electrical tape AND foil tape... and both after a day or two keep coming untaped. This last attempt (the third attempt) i taped 4 different pieces of foil to hold it down. all very neatly taped.... today when I get home the rack is at 102 degrees because the dam thing came untaped again causing the probe to not be in direct contact with the flexwatt.

Getting frustrated. What am I supposed to tape the probe down with? what am i doing wrong???