Best practices to clean the binding posts on your speakers and amps?

I use the Caig Deoxit kit and an appropriate brush. Cheers , Mike B. 

Careful cleaning plated connectors to not rub them off. 

Clean first with IPA (Alcohol).
Caig Deoxit D100L to clean, G100L to protect, maybe use IPA between. Some kits have both.

I live on beach and can tell you the way Ive had great luck disassembling as far as you feel comfortable, then microfiber or white scotchbrite as most aggressive (being careful not to scrub off plated metals) by using the 5% deoxit red spray can to clean as much residual dust and oxidation as possible, then I’ll finish with the 100% deoxit gold formula in the nail polish container to protect and it lasts at least 6 months to a year. Absolutely worth the effort to keep everything looking like new.

Good advice here.

I follow a similar pathway.

I like to use small foam swabs--get them on Amazon.

If a pure copper post, I would clean with Caig Deoxit, then pure isopropyl alcohol to remove any residue, then a thin layer of Caig ProGold.

If a visibly clean plated connector, then I just use the alcohol followed by ProGold.