Cleaning your DSLR Sensor from Bud Thorpe on Vimeo.
Here’s a great tutorial on how to clean your camera right. If you take your time, you can safely and effectively dry and wet clean your sensor. I’ve been using a kit from Copperhill Images that included PecPads and Eclipse for several years now with good results. I got their sensor brush as well, but found it was too easy to accidentally smear lubricant or other contaminants that may be in the chamber across the sensor. It sometimes forced me to wet clean when I only wanted to do light dusting, so I stopped using it. Instead, I’ve found that using a blower to blow dust out of the mirror box and directly off the sensor regularly is easier and just about as effective as a sensor brush between wet cleanings. Blowers are also great for cleaning dust of the front and back of lenses and any other equipment where dust gets stuck in hard to reach grooves.