Try compressed air. If you have an air compressor, you can buy a spray gun attachment for little money that works GREAT. Absent of that, pickup some of the ones in a can for computer and media cleaning - they're just pricier.
'13 Individual Frozen Brilliant White ///M3 Coupe
Ordered 2/15/12 | Euro Delivery on 9/21/12 | U.S. Redelivery on 12/6/12 | Motor Dead on 7/15/13
'13 Space Gray/Mugello Red X5///M
Pavement Punisher | Snow Muncher | Family and Board Hauler | Roadtripper