Originally Posted by
Grand Bois
I never lube lined housings, but I use only stainless cables.
When teflon lined housing first came out, most of the tech sheets said lubing was no longer necessary or advisable, IIRC. IME different shops each had their own preference for grease or no grease, as a hired mechanic BITD I had to do it the house way. Many, actually most, continued to grease. My own preference is for light grease.
AFA vintage cables w/ unlined housings,
they absolutely must be greased. It's possible the OP did not know this, as these days many people don't use any lube on cables, and that's where the issue arose.