Trying to choose our favorite beauty tool of all time is not an easy feat, but the makeup sponge is definitely up there. Makeup sponges are a game-changer for makeup application and they make blending your foundation a breeze. It’s likely you already have one (or a few!) sponges on your vanity, but you might still be a little unclear on how best to use it to apply different types of makeup products, or how to keep it clean. Ahead, with the help of celebrity makeup artist Kasey Spickard, we’re giving you a crash course on everything you need to know about makeup sponges.