Try offering a "humid hide". What substrate are you using? One that retains humidity better works WAY better than misting. And don't feed when you see he's
going into "blue" (shed cycle), as both digestion & shedding utilize a snake's hydration & many can't do both at the same time very well...it can cause stuck sheds.
Antiseptics are most effective with immediate use...I'm glad you'll have some on hand for next time, but it's more important to prevent infection now, so use a little
Betadine* or even a small dab of Neosporin (designed for human use, it's safe for snakes but ONLY the kind without pain relief; use sparingly because it's petroleum
jelly based, which can negatively impact future sheds). (*that's a brand name, generic is povidone-iodine, available in every drug & most grocery stores)