What, in people's experiences, is the very best shampoo and conditioner? I have shoulder length, thick, wavy, hair. Has a tendency to be frizzy if not tamed properly. Shampoos I've tried that are meant to smooth hair work for a while but then I end up with a greasy build-up. Ones that are meant to remove build-up leave my hair like cotton wool with no shine . Any input would be much appreciated!