Snout rubbing can lead to horrible disfigurement of his snout and expensive infections. I've had some real trouble with that over the years. The only method I found which works was to block rubbing areas with cardboard. You can use zip-ties to fasten the cardboard to the mesh. IMO the cardboard needs to be 6 or 8 inches tall. He can look outside his habitat from his shelves/perches. The only real cure might be a bigger habitat.
Do you remember about Relocation Stress? Relocated iguanas go through relocation stress for a few weeks to a few months before they adapt to their new situation. It causes loss of appetite, reduced drinking, and reduced activity.
Reduced eating isn't as serious as reduced water intake. Your choice of hydration with Pedialyte is a good one. I suggest keeping it up until he resumes eating normally.