How can I effectively clean and lubricate a rusty bicycle chain to improve its performance and longevity?

To effectively clean and lubricate a rusty bicycle chain, follow these steps:

1. Remove the chain from the bike and soak it in a degreaser solution to remove dirt and rust.
2. Scrub the chain with a brush to remove any remaining debris.
3. Rinse the chain with water and dry it thoroughly.
4. Apply a lubricant specifically designed for bicycle chains, making sure to cover each link evenly.
5. Wipe off any excess lubricant and reattach the chain to the bike. Regularly cleaning and lubricating your chain will improve its performance and longevity.