12. Neglecting to Clean Makeup Brushes

Dirty makeup brushes are a breeding ground for bacteria, oil, and old product, all of which can trigger breakouts and skin irritation. Both synthetic and natural bristle brushes need regular cleaning, though synthetic brushes tend to dry faster and hold up better to frequent washing. Experts recommend washing your brushes at least once a week using gentle soap or a brush cleanser. Keeping your tools clean ensures better makeup application and promotes healthier, clearer skin overall.