Ivana - when i was at trade school (i'm a hairdresser) they said that you should use bicarb and oil together leave it on over night if you can - this way it gets down into the folical - its just a blocked subaceous gland that is causing it to crust - if you can unblock them completely it will not come. they themn said to use a face washer with warm water on it and rub gently over her hair. - the lady who told me this was rather old!! so it might or might not work - i've never had to deal with it before.