If it's a brush you use daily, we recommend washing it weekly. Use warm water and a mild cleanser such as baby shampoo. Lather the bristles with cleanser and rinse under water until the water runs clear. Try not to fully submerge the base of the bristles in water or your cruelty-free bristles may detach from the form. After rinsing, smooth brush head back into original form. Let dry overnight and wake up to a refreshed brush for your morning makeup routine!.