I thought the same thing......but moving the probe was the only way i could get my temps right. I used foil tape to secure it......and my Helix thermostat is set to 96 and the temps inside the tub are always 92-93 (perfect) I'll get a pick up in two minutes.
mine is secured with the foil tape also. but again the flexwatt doesnt feel friggin 106 degrees lol. it feels warm but certainly not hot by any means