A knew a guy who restored watches and used his nose and forehead grease all the time.

I keep some FF around when students have refused to invest in new strings and the grime prevents smooth finger movement. As for Finger Ease, I just tossed the only can I ever bought and it lasted more than ten years I think, mostly on others' instruments. Not sure if I'll get more.

There must be a good natural product that can be made at home for less.

Peace, Mooh.