Clean your makeup brushes every week with special makeup brush cleanser, or with liquid dish soap, hand soap or baby shampoo. From time to time, you can also clean them with rubbing alcohol. If you use liquid soap, dip the brush into warm water and then into the soap. Press the brush against your palm, swirling and massaging it, then, rinse it under warm water. Repeat the process until the brush is completely clean. Reshape the brushes with your fingers and lay them flat on a towel, to dry.