12 hours and still going strong. It looks like the Tri-Flow did the trick. I plan to reapply at the 24 hour mark as abracadabra suggested.
Just an update for anyone who finds this thread..
It's been about a month and both fans are still doing great. I'm really glad I decided to fix these myself.
Good job! All mine are running fine. I think it's been over 6 weeks now for the first one I did. No problems whatsoever.