Cleaning the Canon EOS 20D CMOS Sensor

CMOS sensor cleaning on the EOS 10D (and 300D?)
Good site with info on cleaning the sensor. I ordered the "Photographic Solutions Sensor Swabs for Nikon D1/h/x, D100, Canon D30 & D60 and Canon 10-D, 12 Pack" and the "Eclipse Cleaner System" liquid lens cleaner.

One swab with three drops on a side was all it took and a swipe one way and flip and swipe the other.

If you get a DSLR you'll need to clean it at some point unless you never ever ever change lens, then I guess you're OK. But I bought a DSLR to change lenses so cleaning was inevitable.I also have the Canon ACK-E2 AC Adapter for EOS 10D, 20D cameras but it wasn't required. Although you're supposed to do the cleaning with a fully charged battery so the shutter doesn't swing close while you're working.

The dust isn't actually on the sensor surface. It's on the surface of a filter which is in front of the actual sensor itself. This is why dust shows up more at smaller apertures. Since the dust spots are some distance from the actual sensor pixels, a wide aperture lets in light which can "go around" the dust spot.