A: As our art brushes are very fine and delicate, we suggest trying to avoid using alcohol and gel cleanse on them as much as possible: using too much of these products can be quite drying to the bristles and can lead to a frayed brush. The best way to keep your brush clean while maintaining its shape is to wipe off excess product with a clean, lint-free wipe or piece of paper towel, then gently roll the brush head in Tacky Top or No Wipe to help pull out any residual product left behind. After you gently roll the brush back in to shape, carefully replace the lid* and store in your Ugly Duckling Brush Case. *Please Note: only Ugly Duckling Premium Crystal brushes come with brush lids. For Pearl Wood brushes, please store in a dark place, away from exposure to UV/LED light to avoid curing your brush bristles.