To clean a spoolie eyebrow brush, start by rinsing it under warm water to remove any excess product. Then, apply a small amount of mild shampoo or brush cleanser onto the bristles. Gently massage and swirl the brush in your hand to work the product into a lather. Rinse the brush thoroughly under warm water until all the soap is gone. Use a clean towel or paper towel to squeeze out any excess water from the brush. Finally, reshape the bristles and lay the brush flat on a towel to air dry completely before using it again. Regularly cleaning your spoolie eyebrow brush helps to remove dirt, bacteria, and build-up, ensuring it stays hygienic and performs at its best.