Relieves "shampoo boredom" and build-up. What: A weekly (any day) detox to rid hair of product residue, hard water minerals, pollutants, you name it. Perfect for product junkies and infrequent washers. Who: Anyone (except color treated). Ideal to use just prior to masques, and color/chemical treatments. When: Weekly (any day will do); before masques and/or color/chemical treatments (not after). How: Wet hair, lather in palms, massage through and rinse thoroughly (no need to repeat).