There is a thread running on dpreview about this 'method'.
As this is non contact/invasive & used with a blower only to dislodge the 'loosened' dust it has a lot of appeal.
There is mention of a commercial product the Milty Zerostat (UK price approx £35) that is widely (?) suggested for the vinyl audiophiles.
I would welcome any qualified views or user experience of using such a helper device.