I've had a similar problem with my BP hating moss. Whenever I notice my snake is about to shed, I usually put some damp moss on his hides. I have noticed that after placing the moss, he hates going in his hides for a few hours to a day or two, no idea why. Might be because he's not used to the dampness of the moss, or like other people stated the chloride smell. Although I do know that whenever I change his water, he always goes out if his hide to investigate the new water and even take a drink from his fresh water IDK! It could be a possibility that he is scared or unfamiliar with the new moss and that unfamiliarity is causing him to be wary of it.

Have you noticed anything with the switch to bottled water? Never tried it but it does seem possible, but then again all BPs are different no?

Sent from my DROIDX