As a makeup artist, I always get tons of different makeup questions, one of the most common amongst my clients in makeup brush maintenance. I always recommend using a mild shampoo such as baby shampoo, doesn’t matter if you use store brand or Johnson & Johnson. For personal brushes, I recommend washing your brushes once a week to help prevent unwanted breakouts and acne. For professional brushes, I prefer to deep clean my brushes after each job for sanitary purpose. Stores such a MAC, Sephora as well as many other makeup brands do sell brush cleaner which I use while working.