Could you survive without shampoo?
It seems crazy to most people, but not washing your hair can actually leave it in better condition. This is a very interesting story on the subject: -
http://www.dailymail.co.uk/femail/article-394226/Could-survive-shampoo.html
Here's a short intro to the article: -
"BBC presenter Andrew Marr has given up washing his hair - saying the scalp's natural oils will keep it glossy and clean. We challenged five women to do the same...with surprising results"