How a PC Duster (condensed air) can make your 3D printing a lot easier?

How a PC Duster (condensed air) can make your 3D printing a lot easier? Just a little tutorial on this tiny but so useful trick.
http://www.youtube.com/watch?v=9Fhz3F4XYF4

Sounds dangerously close to “lose weight with this one simple trick”

ahaha, well, nothing that bad should happen but it’s always good to be careful :smiley: