I did not know these methods, really that the bath with milk I find very interesting, usually to clean my face of all blackheads and blackheads I use sugar scrub with blue soap, I make a pastica and I pass it in the face, I I leave it there for about 10 minutes and that's it, your face will be pretty good, surely many know this method
Never heard of blue soap but it sounds interesting. Do you make it at home?
I know it's a little late to answer this comment, but I hope it helps, blue soap is a very popular product in my native Venezuela, this soap is made with some of the properties that can provide a benefit for the care of the skin