Here’s a great way to extend a bottle of shampoo and get softer hair in the process: Mix 2 teaspoons of baking soda and 2 tablespoons of shampoo in 2 cups of warm water. Pour the solution into a spray bottle. You’ll only need a generous squirt to clean your hair.
This amount usually lasts about three weeks. I have fine, dry hair, but after using this mixture my hair is healthier and softer.