Give you a flawless foundation application every single time. No streaks and no areas with too much makeup or too little. Give you a flawless foundation application every single time. No streaks and no areas with too much makeup or too little. Make up Blender Sponge , apply it like a Pro If used daily, we recommend washing your sponge once a week with a mild cleanser. Baby shampoo or any low sudsing soap will work. Rinse well and air dry.