I have to wash my hair every single day or it just goes lank and horrible at the roots. What am I doing wrong? Since moving from East Anglia to Devon my hair hasn't been the same, so I assume the water has something to do with it. Can anyone reccommend a really good shampoo that will let me go a couple of days between washes? Right now I'm using Tesco's tea tree stuff, which makes my hair look beautiful, but only for one day