I would just mist and put in the damp moss.

When I clean my naturalistic cages I remove the waste and all the substrate under and around the area. I go all the way to the bottom of the tank. I then wipe that area with cleaner. Wipe it dry and then replace the missing substrate with fresh stuff from my tub of it.

In my tubs with Bloods sometimes when they release its a total loss and I just dump it, clean it, and then replace fresh substrate. The small releases from my other snakes don't require such action.