I use Crisco, the non butter flavored kind. (I started using it yrs ago when shooting blackpowder pistols)

odorless, $3 buys a 5lb tub that will last you for over a decade.

Just a little dab will do you. Put some in a small lip balm container, 35mm film roll or like me in a old No. 11 cap container.

I have put over 500 shots on my string and still looks brand new..