The thermostat is dropping and so is the humidity. Between increased static and super chapped skin, the harsh effects of dry winter weather can make the holiday season much less merry. When these tresse-stresses set in, your instinct may be to hydrate your mane with ultra-luxe masques and conditioning treatments. But the ultimate solution to dried out strands actually starts at the scalp. Exfoliate your way to a magnificent mane with these eight scalp scrubs.