It doesn't seem necessary to clear anything: my cache, cookies and history are never cleared, yet this message is remarkably persistent.
There should be a "Never show me the 'Share games on your Facebook Timeline!'" setting.
I pay for membership to avoid adverts and this is just as intrusive and annoying as any adverts.
I keep seeing the "Share games on your Facebook Timeline!" splash/banner appearing, on the home page, underneath games and so on. I've clicked "No thanks!" several times, but it still comes back later.
How can I make this go away permanently?
If it makes any difference, I've got Diamond membership.
Cheers,
Dave.