2) Blow it off.
Proponents of the canned air method often use Falcon Safety Products' Dust-Off ($14, direct; www.falconsafety.com) to blow off the dust. The key when using any type of blower is to use dry, compressed air at a very low pressure (max. 20 psi). We suggest using a blower brush, with the brush tip removed, to avoid too strong a burst of air.