When was the last time you cleaned your makeup brushes? Most people respond to that question by asking the question, "How often should I clean my makeup brushes?" I will answer that question with this question, "How often do you wear makeup?" Thats your answer! Makeup brushes should be cleaned everytime they are used. This prevents you from putting dirty makeup filled brushes onto clean skin, which in turn can cause breakouts (especially if the brushes are used everyday without cleaning them).
Brushes can simply be wiped off quickly with brush cleaner, or they can be shampooed daily. If you are not disciplined to clean your brushes everyday, I suggest cleaning/shampooing them once a week. Baby shampoo, antibacterial handsoap, and/or Illusions Cosmetics' brush cleaner (coming to the Illusions cosmetics "Pro Page" section of the website soon)are a few suggestions of what to use to clean your brushes.