To clean your brush, wet bristles with lukewarm water. Be careful not to wet the base of the brush. Place a drop of makeup brush cleanser or mild shampoo in the palm of your hand or a dampened cleansing board. Massage or agitate the bristles. Rinse under warm water facing down and squeeze out excess moisture with a clean towel. Reshape the bristles if needed and let the brush dry hanging off the edge of a counter.