What are the best methods for cleaning and maintaining a bike chain to ensure optimal performance, including the use of bike chain grease?

To clean and maintain a bike chain for best performance, start by wiping it down with a rag to remove dirt and grime. Then, use a chain cleaning tool or a brush with degreaser to thoroughly clean the chain. Rinse with water and dry completely. Apply bike chain grease to lubricate the chain, focusing on the rollers. Wipe off any excess grease. Repeat this process regularly to keep your bike chain in top condition.