Clean your Brushes: 1. Run the synthetic bristles of the brush under warm running water. (Do Not Use Hot Water as It may damage the cosmetic Brushes) 2. Apply a small amount of gentle facial cleanser or brush cleaner to the synthetic bristles and work into a light lather. 3. Rinse the bristles thoroughly under running water. You will notice that the water leaving the brush is tinted from old makeup. 4. Continue rinsing until no color remains on the brush. 5. Allow the brush to air-dry.