It’s incredibly important to clean your make-up brushes frequently. This helps to avoid bad bacteria thriving in those brushes/sponges that cause breakouts.
Here’s how I like to clean mine:
Add warm water and anti-bacterial soap to a bowl.
Immerse make-up brushes into solution to soak for about 5 minutes.
Take one brush out at a time and add another small amount of anti-bacterial soap to the palm of your hand and swirl the brush around to loosen all the build up.
Rinse brush with warm water and repeat step 3 if necessary.
Squeeze excess water out and lay on clean paper towel to air dry over night. Voila!