To use this makeup brush cleaner, first pour some cleaning solution into it. Then, gently swirl your makeup brush on the small knobs at the top to create foam and lather. Next, move the brush through the grooves at the bottom to agitate the bristles and remove dirt. Rinse the brush thoroughly under water. Remember to use a mild cleaning solution to avoid damaging the silicone. After use, let it dry completely before storing it in your makeup case. This will help keep it in good condition for long - term use.