i've used bag balm, burts bees diaper creme, assos, petroleum gel, etc.
bag balm may work for you... along with other magic potions and gels... but i've become a true believer in lantiseptic.
it's designed for adult diaper rash and bedsores - hospital grade stuff. be sure to wear a rubber glove when applying - or you'll be washing your hands forever.
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So long. Been nice knowing you BF.... to all the friends I've made here and in real life... its been great. But this place needs an enema.