ProLink Gold, best stuff ever, and I've tried them all. Cleans and lubes. I usually do it about once a week in season. Chains last almost forever with proper maintenance. Use Prolink to wash away dirt and old lube, keep drying/cleaning chain with paper towel. After you no longer get a lot of "black" on your paper towel, but mostly a grey, chain is clean. Give one last application and sock up any excess with a paper towel. If done regularly, it only takes a couple minutes, a bottle of lube will last a couple months, and you only need a few paper towels. Quick, easy and works great - quiet drivetrain, long chain life, and no rust.