Ready for new bristles for our modular scrub brushes? You're in the right place!  How to Use: Just twist off the old bristle head and compost it, then twist on the refill head and you're ready to scrub again.  Care Instructions: Hang to dry in between uses or on a dry towel to allow bristles to drain. Never leave submerged in water as it will wear on the wood causing it to prematurely age. Bamboo is naturally antimicrobial, but if you need to clean your brush, clean bristles with vinegar to kill bacteria. Bamboo will naturally patina with age. Brush heads should last 3-6 months. Recommended: Twist onto our modular to make sure head is fully secure before use. We also recommend occasionally untwisting the head and allowing the inner portion to dry out fully for longevity. Mother Earth Approved: Pot scrub brush refill is bamboo with palm + sisal bristles. Multipurpose hand brush refill head is bamboo with sisal bristles. Brush handles not included.