A British study found that 72% of women never wash their brushes or sponges, even though they collect dirt and bacteria which can cause breakouts – not what you want when you’re trying to get better skin.
You should wash loose powder brushes every two to three weeks, and those used to apply foundation once a week, says Sanda. Mix a couple of drops of gentle facial cleanser or shampoo and lukewarm water in a cup, swish your brushes around, rinse with lukewarm water, pat dry, and lay flat to air dry.