If for some reason the blower doesn't work and the dust is still there (which happened to me recently), do a lot of research before touching the sensor or using any chemical on it. There are downsides to using nearly anything on it such as water, alcohol, windex, lens cleaning solution, etc.
I bought this kit with Eclipse cleaning solution (
Photographic Solutions, Inc. - Digital & Photographic Cleaning Solutions) and it worked great for me on my K100D.