swimjayIts actually a mixture of things, mostly in part due to the mixture of "herbs and spices" in the titanium. It is a general characteristic of both Vargo and other brands like GSI.
JerkyKenIndeed! Got to off of Amazon for my kitchen faucet cartridge. Before silicone grease however, I would spend sometime (preferably alone ; ), screwing and unscrewing it, as it will breaking in faster without the lubricant. I say alone, because if yours is like mine, it can be pretty noisy. Good luck!