It's pretty tedious work.
1] I unloop the chain, hook it up to a piece of paperclip, hang the whole thing on my bike workstand (extend the workstand as tall as possible).
2] I clean the chain using the unleaded fuel stored in my gas can.
3] Clean between link rollers using pipe cleaners (as in tobacco pipe).
4] The chain dries off pretty fast. I drip the tenacious starting from the top down to the bottom.
5] Let it sit overnight, about 8 hours for me. For some reason, it makes its way through the crevices. Wipe down excess.
6] Clean each link once more with pipe cleaners (changing often). Save the used unleaded fuel to dip the pipe cleaners for getting rid of the excess tenacious they have caught and reuse.
You now have an almost factory-like lubed chain.
Don't get me wrong, you still have a cleaner chain using ProLink, but you'll have a chain that is super quiet.