UTHs benefit a ball python better in the long run and are a much better heat source for humidity. Why would I want to put a second humid hide in all my tubs? Not that I could put a heat lamp on them or anything.
If the UTH is unregulated, it needs to be. Get a thermostat ASAP or remove it and put up a temporary heat lamp. Get a temporary light dimmer and thermometer with probe and have it read 94-96F on the glass inside the enclosure with the UTH under the glass outside the enclosure.
Good luck.