Thanks for replying so thoughtfully! I appreciate it!
Eating great, no mites that I can see (and she's pink, so I think it would be easy to see them). Has both hot and cool hides.
I will try adjusting the heating mat down. I have both a probe on the heating pad, and I have an ambient temp/humidity monitor. I also use a laser thermometer gun to make sure the hot hide is not too hot, since the probe is right on the heating mat I wanted to make sure it was accurate to the true temperature.
The jar is very wide at the top, but I am worried she might get too cold in the water soaking that long, and not be able to get out because she's too stiff and cold. I am still learning about snakes, but it just doesn't seem normal to have a snake soaking that much. Maybe you are right and it's too warm for her in the enclosure still. I can also turn off the overhead LED light for a time and see if that helps. I have removed the jars for now and she's back to a shallow dish. She immediately went to burrow under the substrate on the cool side after seeing her jars were gone. So maybe she *is* too warm.