Ditto to everything you said. Some things work well but in a few days its back and many times it is worse. Anti-biotic cleared it once for a week. I've had this since a barber lanced a little pimple on the back of my neck in 1963.
I'm going to try Prolate dip next.(its used to control parasites like red mange on domestic animals)I am awaiting delivery. I don't know about the vinegar I have doubts but I will try it anyway.