Contour Brush: A buffing brush that is densely packed for targeted sculpting and blending. A step-by-step brush cleaning method Step 1: Squeeze a dollop of cosmetic brush shampoo into a glass or a mug and fill with lukewarm water. Step 2: Swirl your brushes in the water and gently massage the tips. Step 3: Rinse the bristles with clean water. Step 4: Carefully squeeze out the excess moisture with a clean towel. Step 5: Reshape the brush head and lay flat. Step 6: Let the brush dry with its bristles hanging off the edge of a counter, allowing it to dry in the correct shape. Never let your brushes dry on a towel — the bristles can become mildewed.