I have to say I find some of the other items that last seemingly forever more disturbing than the Vaseline. Isn't that stuff just refined petroleum? Looks like it: http://en.wikipedia.org/wiki/Petroleum_jelly

Interestingly that wiki has some good information on when not to use petroleum jelly for certain things.

Anyway, it'll probably last forever.

Thanks again NIM for some really great advice. I find your advice more useful than a lot of other advice because you've given it such thorough personal testing prior to sharing.