Wash your hair when it is dirty If you have an active lifestyle and regularly swim, you may find that you have to wash more regularly after every swimming session. This is due to the chlorine in the water which can be drying. If you regularly exercise and sweat, again you will need more regular hair washing sessions. On the other hand if your hair is not dirty and you have been using very lightweight stylers, you can find that you can stretch your wash days and do it once every 2 - 3 days. Our Shampoos have been designed to be used as regularly or sparsely as needed because we use a very gentle cleanser that does not leave your hair squeaky clean but instead, gently moisturises and cleans your hair. So you see, the question of washing can be as complicated or as easy as you choose it to be.