Did you ever try the silver gel?? It healed mine, but Previous to using it, licking them just made things worse because ironically it just seem to dry them out more.
It's a infection of some sort. Mine was fungus, but the silver gel kills any pathogen. Give it a try. If it doesn't help. it won't hurt either.
And while the other poster is a bit colorful in language choice, they have a point. Why keep doing the same thing over and expecting different results? You know that's AA's definition of insanity, right?