Sounds like a respiratory infection, which is often caused by too law of temps (and proper or high humidity with the low temps). A couple ways to deal with that; make use of the search bar on this forum
As for stargazing, I don't think that is what yours has (but I could be wrong) but that is a neurological condition and can't really be "fixed"... if I'm not mistaken.
However, very important:
- What are your temperatures (cold side/ambient, hot side, hot spot)? Edit: I see you've address that already! My apologies. They seem pretty good.
- What kind of thermometers are you using?
- What heating methods do you use?
- How are you regulating them?
- What does your hygrometer read at, percentage-wise? (And what kind of hygrometer is it: dial or digital?)
A photo or very detailed description of the overall tank setup would be helpful as well!
Please and thank you
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