I would NOT use baking soda or apple cider vinegar on my hair. Both can be VERY drying because they're used to clarify the hair. While I've never used baking soda, I know for a fact that apple cider vinegar will completely dry out your hair making it brittle & hard. It will also make your hair shed. To get the same results, you can clarify with a sulfate shampoo without the dryness, brittleness or shedding. But a sulfate shampoo will clarify your scalp.