The best and safest remedies I have found for dry scalp is massaging pure virgin olive oil into the scalp. Warm it first, just warm to the touch then massage into the scalp and wrap in a towel for about 30 minutes, shampoo and after a good rinse mix either a fresh squeezed lemon or Apple Cider Vinegar in a cup of warm water and rinse over the scalp. Don't worry about the smell, it will all be OK when the hair is dry. This will make the hair clean and manageable.