I've got a couple of spots of dust on the sensor of my Canon 20D. A rocket blower isn't shifting them, and I'm ridiculously scared of some of the more direct methods for cleaning sensors — what methods/systems have you tried, and how successful have they been?
Answer
A cheap rocket blower can be worse than not cleaning at all. It inhales air from your environment, which can be dustier than your sensor. If you use one, make sure to get a high-quality model which includes a filter.
I use Pec Pad (pecpads) and Eclipse cleaning solution, with a sensor swipe. This link has all of these products in the search. It works well to remove spots.
A tip: take a picture of a clear blue sky at f/22 to identify all your dust spots.
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