I like the suggestions folks have made.

I had an egg-bound sinaloan years ago. I put her in a bigger enclosure (tub) filled with coir fiber, the coconut husk stuff. I moistened it just enough and left her in there. She passed the slugs fortunately after a few weeks.

The next year I put her in that same setup after she shed, and she laid good eggs earlier. I am fairly convinced that the larger nest box (her entire cage is the nest box) was more conducive to her laying before the eggs got bigger, hard or stuck.