Featured in Bustle: 40 Hair & Makeup Mistakes You Don't Realize You're Making, According to Experts

Amber Rose Johnson, a skincare expert, esthetician, and founder of the Facial Lounge, tells Bustle that there's a correct way to dry your makeup brushes before packing them back into your makeup bag. She says, "Make sure to wash your makeup brushes weekly and lay them out on the windowsill to dry in the sun." This, as a result, should help prevent bacteria growth before storing them in between uses.