She can't create water, so if its too dry then they can start to shrivel. I thought the same thing, and just kept her set-up as normal (which she'd always thrived in - good sheds, etc). But after about a week the eggs started shriveling like they were, too dry. So I swapped out the bedding that she wasn't on with cypress mulch and would spray that a couple of times a week to keep the humidity up. The eggs plumped back up and all hatched.
I think you did the right thing by adding the moist moss.