I have my hair very dry from colouring and using straighteners, but it seems that the shampoo and conditioners for dry hair gets my hair even more dry, instead of letting him hydrated!? I tried several brands and all were the same. But if I use a shampoo and conditioner for normal hair, it gets less dry and more "normal". Why this happens? Shouldn't I have better results with the shampoo/conditioner for dry hair?