I use a liberal amount of gun oils - so my breechplugs and nipples are never installed. That way, no oils contaminate the plug or nipple.Iput them ina clear sandwich baggie & hang them on the end of the installed ramrod.

My rifle is stored muzzle-down for one week - so excess oil can drain onto a rag below - then turned over muzzle-up for the remaining time. My assortment of gun oils are alternated after every use &the brands I use are:

Birchwood-Casey Sheath
Rem-Oil with Teflon
Breakfree CLP