I use this:
https://www.ebay.com/itm/392244224374?var=0&mkevt=1&mkcid=1&mkrid=711-53200-19255-0&campid=5338590836&toolid=10044&customid=76c70bcd78a11f7afdd4691a1bf47cc3
And PJ1 cable lube. It's designed for dirt bike clutch and throttle cables but works for just about anything.