I'm not sure that I trust people who don't use soap
I got interested in exploring options with regard to creating my own haircare products. Someone mentioned shampoo bars, and I actually tried using a cold-processed soap recipe that was formulated for hair. About three days into using it, though, I totally gave up and realized that is not going to work for my hair.
I believe after about a year of researching and formulating, I finally have a product that I can share. I use it, my husband uses it, and we both like it! There are a couple of advantages to solid shampoo; 1) no waste from an empty bottle and 2) it is already TSA-compliant since it is not liquid.
I do still use a conditioner after rinsing and have just recently added a solid conditioner bar to my product offering.