I bought this powerful Air Duster

[PiKa]

Like i said, i usually blow outside, so don't matter.
Nothing much to blow indoor.

Even for my vacuum, i empty the dust outside, nearer to my neighbour's door

a good neighbour is had to come by these days

 

[paul02]

Guys, you don't have to use the blower at max settings every time, you can always use it to the point that it is most effective.

 

[pokipoki08]

Just be careful with the PC fans, heatsink , casing, psu and gpu. If you force spin them way beyond the rated rpm, it will cause damage to the bearings. Also don't blow too close or use too powerful to the board it will damage or bend smaller components.

Still have sweep the floor for the blown away dust.

need to secure the fan blades, dont allow rotate
also disconnect the fan wires, the current backflow from rotating fan motor may short something