I used the acv and it works but I have a hint for people with winter scalp (flaky tight scalp). Steep 2 bags of chamomile tea in 2 cups warm water for 10 minutes. Add a dash of lemon juice and 15 drops of calendula (marigold) extract then pour onto scalp and let sit for 10 minutes and shampoo and condition as normal. I have done this 2x a week wince winter set in and it is perfect. No more flaking or redness.