Since FB didn't say it ----- clean your chain very, very, well, and dry it completely. I find a solvent like naptha, or real mineral spirits, works very well in a gatorade bottle. Change it until it stays clean.

Dry it very thoroughly in a warm place, not exposed to flame.

When thoroughly dry, apply "Chain L" according to directions.

Your chain will be very happy, and so will you. Reapply as needed.

MHO - Chain L is the best there is, over the counter, for chains.