● THE UK: Scientists at Unilever’s Port Sunlight research center said they have pinpointed the optimum hairwashing technique, step-by-step. The researchers conducted tests on more than 500 volunteers to rate various wetting, lathering and rinsing techniques. The six-month study resulted in the following suggestions: • Use running water at 37.5°C. • For short hair, six mililiters of shampoo should be used; for medium-length hair, 8 mililiters and for long hair, 10 mililiters. • Latherin...