Here is a tutorial on how to clean your MAC makeup brushes correctly so they can last you years and years! Also, when your MAC makeup brushes are clean your makeup will go on much better (stronger, more even color). Avoid using harsh cleansers to clean your brushes and use a gentle MAC brush cleanser instead. In this tutorial I am cleaning all natural hair brushes which you should do at least monthly (deep cleanse). It is best to give them a clean swipe with MAC brush cleanser every use to every other use.