Unplug the uth until you get a tstat.
A tstat is simple to set up. All you do is plug the tstat into the wall and then plug the uth into the tstat. You run the tstat probe under the tank sandwiched between the uth and the bottom of the tank. Then you just figure out what temp you need the tstat set to give a proper hotspot.
A snake needs you to provide temps within the proper range at all times. How you do this is up to you. I have a heated snake room so I don't need lamps or uth but I choose to provide them with uth anyways. That's a personal choice. They would be fine without it but it is there if they want it.
Realize a uth does nothing for your air temp and it is easy to use a lamp to provide a hotspot and proper air temps at the same time. Until you get a tstat unplug the uth and use a lamp alone. You do have a lamp?