If they do no poo, mix the baking soda with silicone free/lightweight conditioner. You can also make a spray of a little bit of conditioner and distilled water in a spray bottle. Other things to try is a bit of jojoba oil and distilled water in your spray bottle or even a some drops of essential oil (like lavender).
Baking soda and water alone gave me staticky, limp, brittle hair with a not so clean scalp. It was really weird. It worked great at first, because it was getting rid of existing product, but then it left my hair dry and limp and I just couldn't get the method right.