I apply the ACV with a dropper just like you would a minoxidil solution. Usually before I plan to shower. I saturate my entire scalp and let it sit for at least 30min. I use Bragg's organic ACV. I suffered insanely itchy, inflamed, persistent seborrheic dermatitis for over a decade. I would constantly itch at my scalp which would always feel oily and sensitive. After using the ACV, ALL of my symptoms were relieved. I used it once a week for the first month or two - just to be aggressive. Now (for the past 3-4 years) I only apply the ACV once a month or so, just to maintain. My years of torment are all behind me. Something to be aware of: for the three days following an ACV treatment - whenever you sweat or get your hair wet - you will smell like a salad. But it's completely worth it. The relief is amazing, if you are suffering from the itching and discomfort that I was. Actually, my father has suffered his entire life from the exact same issue. I told him about the ACV the moment I began feeling relief. Now, he is also free from all of the symptoms that tormented him for nearly 25 years. Definitely give the ACV a try - it's cheap. If it brings any of you the relief it has brought me, you will be happy you did...