All you need is a dirty makeup brush, a tablespoon of vinegar, and water. Mix together HOT water and a tablespoon of vinegar and let your brush soak for 15-20 minutes. Next do a hot/cold rinse, first rinse in hot water, then in cold. Pat your brush, dry and enjoy a clean make up brush! This way of cleaning your brush disinfects it, dissolves built up makeup, and is very inexpensive.