Brushegg makeup brush cleaning tool. How to use the BrushEgg: Step 1 - Wet makeup brush Step 2 - Apply mild cleaning solvent like shampoo or liquid hand wash on the BrushEgg. Step 3 - Twirl your makeup brushes around to lather them up on the smaller knobs. Step 4 - Move the brushes from side to side over the groves to get rid of stubborn dirt. Step 5 - Rinse with clean water and let your brushes dry on a flat surface.