Clean Makeup Brushes: antibacterial dish washing liquid (or) hand-wash, olive oil, white vinegar. In a bowl, pour enough white vinegar to cover the bottom, add a swirl of antibacterial liquid and a few drops of olive oil. Softly swirl brushes in solution. Once residue is lifted, rinse in warm water. Allow your brushes to dry lying down so water won't run back into the base of the brush.