Frustrated with trying to heat tank

[200xth]

I'm just so frustrated and confused. when she was in her baby tank as a hatchling a 10 gallon glass I could keep the temperatures and humidity levels exactly right. I really didn't want to get a glass tank as her adult one but that's what happened due to bad advice but I'd really like to get it back where everything remained as it should be it just seems like we started getting cooler weather at the same time as we put her in the bigger tank

If the ambient temp is 78 and your UTH can provide a hot spot of anywhere from 87 to 91 or 92, you should be fine. When they need heat they'll move to the hotspot, when they're done heating up they'll move to the colder end.