How severe was your dandruff though, was it the dry kind or the oily sebum type that is almost pus like?
Mine is the latter very severe and mainly comes off only after a shower when wet and only if my hair is short. It doesn't flake but rubs off basically.
We'll see hope it flakes off but doubt it would probably take a few times using in my case.
I'm starting Wednesday will let you know how it goes, going to get a glass dropper bottle.