Pro Gold Products ProGold ProLink Chain Lube, 4oz

Periodically clean the chain wiping it as best you can (I use SimpleGreen wipes). Use a new wipe if the previous one gets too dirty. https://www.amazon.com/dp/B09KP14RVQ/ Lubricate liberally (I use ProLink) and wipe off any excess. https://www.amazon.com/Gold-Products-ProGold-ProLink-Chain/dp/B000VT2HKQ/ I do mine weekly. Don't wait for the squeek LOL. If the wipes are coming off filthy, increase the frequency. In my experience, the final rag gets cleaner each week meaning more and more dirt and grime is removed.