Well, because you used warm water for your rinse, this raised (or opened) the cuticles on the hair shaft, leaving your hair with a rougher texture. So, the first thing you should do is get some colder water on your hair. read more
This all really depends on your hair and what your hair likes. For some they can shampoo and condition the henna coloring recipes out, and for others the best option would be to co-wash (conditioner only wash out). read more