It will be right soon. Having the probe in the wrong spot had the uth running much to hot.
The probe can be set to one temp but the felt temp on the cage floor may be different. Use the temp gun to find just where the tstat needs to be set to give you the desired hotspot. The numbers will be different. An example is the tstat may be set to 99F but in the cages floor it may only read 95. You lose heat as it works is way through the layers so usually the tstat is set a bit higher than the desired hotshot.