Walang Pangalan , Mar 28, 2007; 12:00 p.m.
I've used "canned air", brushes, and blower brushes. I've even used my own breath. One day I'd like to try the trick some car-wash joints use, and bring hydrofluoric acid to bear on the problem. What's a little toxicity when it comes to such a critical problem?
So I suggest you use your head. But remember that whatever you choose, the absolute worst case is that you have to buy a new one. Maybe $35?