When it comes to makeup, hygiene is of the utmost importance. Not only should your makeup be fresh, but the tools and brushes that you use to apply it should be cleaned on a routine basis to ensure maximum performance.
Powder puffs, foam eye-shadow applicators, and brushes all begin to collect makeup residue, oil, dirt and bacteria that can cause pimples. By keeping them clean, you're much less likely to experience problems with blemishes.