Organic shampoo if baknig soda considered organic, don't know.Baking soda [don't know if British term is different]10% solution Apple cider vinegar and warm H2OMix a couple of spoons of B/S with warm H2O in container that can go in the shower. Pour mixture thru hair, massage in. Rinse. It won't foam and has no real smell, but you can scent it if you choose.Do ahead a bit, but warm is nicer than cold:Mix the A/C vinegar with warm H2O [I use a squeeze bottle] and squirt liberally over hair avoiding eyes. Rinse.Hair is shiny if it is given to shine bouncy if given to bounce but will only stay clean a day or two. They say once your hair adjusts to this treatment. I only use it from time to time but it is interesting to do. Frees the soul.