Matrix Biolage Sugarshine Polishing Hair Scrub (220g for £11.60, although higher and lower prices available)
A pre-shampoo sugar scrub for hair and scalp, which removes product build-up and impurities out of the hair. Gentle yet effective, smells fruity-citrusy. Basically, you wet your hair, massage the scrub along all of the hair, wash out and then continue with shampoo and conditioner. You know what? I love it. Yes, I use a bit of product in the hair, but not too much, and yet this scrub makes a huge difference to how my hair feels. After blow-drying, hair feels a lot softer, and stays cleaner for a bit longer. I do this once a week, and will definitely repurchase, but I am also now more open to other hair/scalp scrubs. Exciting!