What do folks use to clean cables/connections?

I'm not sure if this is the best advice, but I do it and it seems to have worked well for me over the years: I go to my local hobby store (model trains) and buy a bottle of "Rail Zip". You apply it with a cotton swab, then wipe it off 24 hrs later with a rag or cotton swab moistened in water (I use distilled). Cost is about $5.oo a bottle which will last for years, I clean my cables about every 6 months or so. Happy listening.

I like Kontak. It's pricey...like $40 a bottle...but I can hear a difference.

Good luck.

I use the Caig de-oxit cleaner and contact fluid I bought from Music Direct.