Removing built in dust

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Guest

Guest
Greeting everybody, I recently cleaned my PC from dust as much good as I could. But I noticed that there was little left in some spots that couldn't blown away. That's why I found some air duster cans on internet to buy. But one day while I was searching on eBay for different things I found some Blowing Balls http://www.ebay.com/sch/i.html?_from=R40&_sacat=0&_nkw=Black+Rubber+Blowing+Ball.

I first I thought I would be great to buy one of those because I won't have to buy a new one as I would do with an air duster can because this ball would last more than the air duster(maybe forever). But I saw a video on youtube for something that I want to do to my PC and the person on the video had one of those and as I could hear It wasn't blowing so hard as an air duster.

And so I'm asking if anyone have tried those and if those balls are good enough or It's better to buy an air duster?