sensor cleaning

Spent a couple hours cleaning the sensor of my Canon 20D. It's quite easy. I didn't practive before dong the real thing. Repeated three or four times. The success was obvious, although not complete. So I think it's responsible with my first-hand experience to recommend the now-popular Copper Hill method:

http://www.pbase.com/copperhill/ccd_cleaning

Related sites:
http://www.photo.net/equipment/digital/sensorcleaning/
CleaningDigitalCameras.com
Image Sensor cleaning Tips and Techniques