If the temp change does not work, recheck for mites. I like to keep my humidity at 70-80%. Gus Rentfro (boa expert) does not think soaking is all that great. Usually it is a sign of mites, dehydration, or overly hot temps but not always. My boa never soaks so you may want to keep an eye on things for a bit. If mites are even a question, switch to paper towel substrate for a bit and see if you spot any in the next few days.

Good luck!