Rebel XT and Dust on Sensor

Dust on sensor can produce spots on your photographs, especially if it's shot with a high DOF (high f-stop value/smaller aparture). They generally become visible in one-color section of photos (like the blue sky). There was a nice explanation why we don't see this problem on film cameras, and why it is Digital SLR specific problem:

It is something that just comes with photography when you change lenses.
In the old days we send the film with dust particles and all to the
development centre. When you loaded a new film in the cam the new film
started to collect dust all over again.

These days we don't replace film anymore, so the sensor accumulates the dust
over time.

Although I haven't had this problem, I'm anticipating it soon. More so since I change lenses more often, and shoot at outdoors more often. Recently there has been a discussion going on the 350d yahoo groups and someone suggested the following steps to clean a sensor. There are suggestions for this all over the web, but this is a first hand account of sensor cleaning:

1. took a test shot for reference, so that you can see if your cleaning action moved, added or removed contamination
2. used the Giotto Rocket blower to clean the mirror box and sensor
3. took a test shot, compared to 1, noticed that amount of dust particles wast decreased but some remained
4. used the sensorbrush
5. took test shot, compared to 3, noticed that amount of dust particles wast decreased but some remained
6. repeated 4 and 5 until no further improvement was possible with the brush. Some 'welded' spots remained
7. used sensorclean (the fluid cleaner)
8. took test shot, compared to last test shot and noticed that most dust is gone except for a few die-hard minor spots.