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This is what I've done for years:

- get a Styrofoam cup and poke a small hole in the bottom

- put a drinking straw about halfway through the hole (should be snug)

- put the nozzle of your vacuum cleaner into the inside of the cup, so that the straw goes up the nozzle

- use the straw on the outside of the cup to carefully vacuum dust out of those tricky areas. The flow is much more controlled and accurate

I've never ever had a problem. In fact, I don't use compressed air around components, because they spray condensation

Hope that helps.
 
In my childhood I killed a PC with a vacuum cleaner, but my fault that it was turned on :D

But after that I cleaned computers with a vacuum many, many times — all without a problem. Simply make sure to unplug all the wires.
 
I have used vacuum cleaners to clean electronic devices for 30 years without an issue, just use some care and consideration.

I don't hold the vacuum nozzle very close to the board, just close enough to draw in the released dust then I use a combination of a lens brush and canned air to dislodge the dust which is captured by the vacuum.

if your worried about static use a static field service kit and strap your wrist to earth, and use that hand to hold the vacuum nozzle.

Don't dust with the power applied to the device.
 
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