I've used poly in various forms for over 30 years. It seems to have a finite lifespan, before it completely disintegrates. Reminds me of fire ant bites, somehow they all know to bite at same time, poly fails the same way. The strangest aspect, I often at the auto trade shows, like PRI, the exhibitors that have poly products, asked how and why the stuff fails, I get the tilted head blank stare dog look answer. I have stuff never been off the shelf, disintegrate, all colors, all conditions. Age seems to be the only common factor, and every item seems to have its own amount usable time. Yours ran out. I don't think it is a lubrication issue or type, that effects lifespan, contrary to popular thinking.