The ‘Brush Out Bath' by Paula Dorf is a gentle shampoo for professional makeup brushes. For weekly use to keep your brushes soft and flexible. Pour a dollop of shampoo into palm gently stroke brush back and forth to clean. Rinse in cool water, squeeze out excess water and gently re-shape the hair. Dry by resting the hairs over the edge of a surface. Do not dry upright—it will ruin the brushes.