A little of either "triple antiseptic ointment" (it's not "antibiotic" & that's not the same thing, though a common misnomer) or Neosporin (not pain relief formula) are both safe to use topically on snakes, but just bear in mind that they're petroleum-jelly (aka "Vaseline") based and they WILL mess up your snake's skin & future sheds if more than a tiny amount is used. That's why Vetericyn ointment is better- it's water-based & made FOR use on reptiles.
And btw, Betadine is the trade name for povidone-iodine- so using the generic is fine- same thing-it's made for humans but safe also for snakes- just should be diluted. Does not need to be washed off.