A good shake certainly wouldn't hurt, unless you shake it so hard the head of the duster flies off.
Seriously, CCD and OXO claim that the dirtier their dusters get, the better they work! So don't be afraid of a little dirt on them. Just don't glide them over bird "residue."
RamAirV1
Seriously, CCD and OXO claim that the dirtier their dusters get, the better they work! So don't be afraid of a little dirt on them. Just don't glide them over bird "residue."
RamAirV1
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