Don't think you should salt bath her unless she's got fungus. Probably putting her in the fridge (above 5 degrees celsius) would be wise especially as you've got temperature issues (haven't we all!) and giving her a spell in there can't hurt if she's stressed or unwell. Mine has just gone back into his tank after 3 weeks in the fridge because it's been too hot here. Adult axies only need to eat 2-3 times a week, but probably a bit more than that in warmer temperatures ie above 20 degrees, so she may not be hungry or may not be eating because she's too warm. Is she thin? Earthworms are very good food. Will stop here, as I'm a relative beginner, and if any of the above is wrong, please someone point it out.