In addition to makeup residue, cosmetic brushes also accumulate sebum, sweat, and all kinds of impurities, which is why it is very important to clean them regularly. The product beautyblender® Tool Scrub Charcoal will help you remove all makeup from your brushes, keeping them clean and prolonging their lifespan. It will also allow you to use the same brush you just used for blue eyeshadows to apply beige ones, for example. Or to use the same brush to do a friend's makeup without worry.