*No need to open your fan, or unscrew it, I did experiment for you.
Not going to explain much, picture are very self explanatory,
Drill in the "A"Use compressed air (gently) to push grease / oil inside the small hole.
As easy as that.
Pic of the inside (for the curious)
http://imgur.com/a/kaRnl#pvIA5If that post made you save time or $ please donate as little as 0.00000001 to show your appreciation.
18CTVYBSi75PHE3rPvh9eXG1RVCHDA173f
Thank-you.