Well of course the best way is to remove your lens, open the shutter and then submerge your camera in a sink of soapy warm water. Shake it around for a few minutes and I guarantee you won't be concerned about dust spots after that!


[:P]


I did want to (seriously) recommend the Rocket Blower. It's the least intrusive way to clean your sensor, and so far it's been sufficient for me - that and the auto-clean routine the camera does on start-up and shutdown.


Dust will show best on shots at small apertures on gray backgrounds - like your shot above. But that doesn't look very bad to me; I'll bet a good cleaning with an air blower would take care of those spots.


One thing - I'm sure you're already aware but it can't hurt to mention it - don't use compressed air. Those cans contain chemicals - the propellant - and you don't want its residue on your sensor.


Shoot that background stopped down to f/22 - you don't have to focus - and then view the shots at 100% on your monitor. Do the air clean and then re-test. I think you'll be pleasantly surprised.


There are many other options but I'd suggest trying the "dry-cleaning" method first. If you need to really "scrub" your sensor there are plenty of good tools out there that'll do the job. But my guess is you won't need them.


Good luck and happy shooting!