100 day test guarantee: We guarantee 100% quality that you have never experienced before. ✨ You can test our products for 100 days. If you and your brushes don't go well together, you can easily get your money back. In addition, the products are also covered by our warranty against manufacturing defects. 

Cleaning: We recommend gently cleaning your brushes every 2-3 weeks with baby soap and water. You can find detailed instructions in our Brush cleaning blog
If you clean your brushes regularly you are on the safe side to ensure a long shelf life and to protect your skin from impurities and irritations.