Does ProGold have a shelf life?

So I'm sitting here using my G100 applicator on my new system and I'm realizing that I've been using the same bottle of this stuff for like five years.

And then it occurs to me -- well, you just finished DeOxing all of those connections (the DeOxit is relativley new) getting them nice and sparkly, and maybe you just wasted all the effort by spreading defunct ProGold all over them.

Any thoughts?

Thanks!

--dan