To use Muc - Off Wet Chain Lube, first clean your bicycle chain thoroughly. Then, apply the lube evenly along the chain, making sure it gets into every link. You don't need to use a lot; a little goes a long way. After applying, let it sit for a few minutes so it can penetrate the chain. Wipe off any excess lube with a clean cloth. As for maintenance, re - apply the lube after heavy rides, especially in wet or muddy conditions. Keep the lube in a cool, dry place to maintain its quality. Avoid getting it on your brakes, as it can affect braking performance.