Using this drivetrain brush is easy. First, make sure your drivetrain parts are cool. If they're hot, let them cool down. Then, use warm water. You can apply the Bio Drivetrain Cleaner to the brush and then use it on your chain, cassette, mechanics, and sprockets. The high - quality nylon bristles and paintbrush - like shape help you clean effectively. The moulded silicon insets give you a comfortable and steady grip while you clean. To keep the brush in good condition, never use it with boiling water or on hot parts. This way, your brush will last a long time and keep cleaning your drivetrain well.