Vacuum advance pod

I have yet again a dead vacuum advance pod. I've gone through at least 3 in the last couple of years. Anyone else experience this? Is it just the ethanol that's eating them up?

Don't know, never had one die.:D
In your area it's totally possible that the fuel is doing it, and one of the reasons I use EFI line for fuel everywhere I can, but that doesn't help a vacuum pod.
I assume your motor doesn't pull enough vacuum to break it, so what's left?