tape the probe to flexxwatt and buy a digital thermometer for the inside of the tub. Its safer and this will never happen to you. You will have to set your thermostat higher to get the desired temp in the tub but thats okay. Also never use tape in your snakes enclosure. Tape = serious injury for scaled critters. Even if its under the substrate - BP's like to burrow and can get hurt.
Cheers.