Yeah all digital Temp/Hydro therms seem to do this. I find that removing them from the tank for several days to let the sensors dry out will return them to working order. I have yet to find anything that works "Great" but for the cost the exo terras seem fine. I am all ears if someone has an end all be all solution


I have found better success hanging my sensors from the top of the tank down the middle. I make sure not to hit it while misting.