I have very short hair so every morning whilst showering I just give it one quick wash with a mild shampoo. I don`t apply shampoo twice, it doesn`t need it and it air dries in minutes. If I don`t wash it then I resemble a petrified porcupine with my hair standing on end.
I like Faith in Nature shampoo too and I`ve used Simple shampoo, plus once or twice a week I use Yves Rocher low poo, its a bit like Wen, a non lathering cream. I`ve also used an unperfumed shampoo base from Naturally Thinking, no nasties, plain and simple, cleans well and costs very little