Using this makeup brush cleaner is easy. First, wet your makeup brushes under lukewarm water. Then, put a small amount of the cleaner on your palm or a cleaning pad. Gently swirl the brushes in the cleaner until the dirt and makeup come off. Rinse the brushes thoroughly under running water until the water runs clear. Squeeze out the excess water gently with a towel. Let the brushes dry flat or hanging with the bristles down. Remember to keep the cleaner in a cool, dry place. Don't use it on damaged or very old brushes as it might not work as well. Also, avoid getting the cleaner in your eyes. With regular use, your makeup brushes will stay clean and last longer.