Tigi Bed Head Rockaholic Dirty Secret Dry Shampoo – Review This is my first ever dry shampoo and I love it’s quirky name! 😉 Tigi Bed Head Rockaholic Dirty Secret Dry Shampoo: Keeps Your Hair Rockin’ One More Day. You don’t have to shampoo every day, but shh…that’s the secret! Spray at roots to absorb excess oils, make hair smell fresh and keep it rockin’ one more night. Less frequent shampooing saves hair from heat styling damage and colour loss. Unbelievable texture is perfect for big hair or updos. Near colorless formula won’t show on your clothes or pillowcase!