Melen, I SO know how you feel!  Go check at your local photography shop, you're supposed to get qtips that's made out of some kind of rubber sponge thingy.  They clean up that dust in no time whatsoever.  They're a bit pricey though.  But then, I'd rather pay a bit of money than have sleepless nights over a filthy sensor - and I've been there before :sad:

The sole purpose in life is serving humanity.