Apply an apple cider rinse. Apple cider vinegar can be very effective at removing dirt, grime, and oil buildup in your hair, as well as any residue from your hair styling products. You can use apple cider on the days you do not use shampoo as a natural alternative or apply it following your regular shampoo and conditioner routine. Add two tablespoons of vinegar to two cups of water and rinse your hair with this mixture. Though the water may smell strongly of vinegar, this smell will fade.