Using the Muc - Off 400ml Aerosol Biodegradable Bicycle Chain Cleaner is simple. First, take your bike chain off if possible or just hold the aerosol close to the chain. Spray the cleaner evenly on the chain, making sure to cover all parts. Let it sit for a bit to allow the cleaner to break down the dirt and grime. Then, use a brush to scrub the chain gently if you want a deeper clean. Since it's water - soluble, you can easily rinse it off with water. As for maintenance, use this cleaner regularly to keep your chain in top shape. If you use the Chain Doc cleaning device, follow the device's instructions for the best results. Also, store the aerosol in a cool and dry place, away from direct sunlight and heat.