Baking soda and apple cider vinegar can be used to remove shampoo residue in under an hour. The baking soda and vinegar can be used as an alternative to, or in addition to, regular shampoo and conditioner. When used regularly, baking soda and vinegar maintains residue free hair, even in regions with hard water.
Apply the baking soda
Mix a paste of baking soda and water, then apply the mixture to wet hair. A small amount of residue-removing or clarifying shampoo may be added to the mixture to allow for easier application to the hair. Continue washing the hair with baking soda until all residue is removed.
Thoroughly rinse hair to remove the baking soda.
Apply apple cider vinegar to hair
Mix 1/2 cup of apple cider vinegar with 1/2 cup of water. Saturate the hair with the mixture, then rinse. Reapply as needed, or until hair feels soft and conditioned.
Maintain residue-free hair
To prevent shampoo residue, add 1 tablespoon of baking soda to a full bottle of shampoo, and wash hair as usual. If hard water is causing shampoo residue, rinse hair with 1 tablespoon of baking soda in a gallon of water before and after shampooing, then rinse the hair with plain water.