You know, I'd like to say first that I tried, and in no way could I make the title of this thread not sound dirty.... Anyway...I have a Manfrotto ballhead that use with my LF equipment (and all my equipment really), and they grease on the head is a bit old. When the head sits for a while, it takes a good knock to loosen it. Any cures for this? I think more grease would help, but what kind?