EGGD From United Kingdom (England), joined Feb 2001, 12377 posts, RR: 52 Reply 1, posted (7 years 5 months 3 weeks 5 days 15 hours ago) and read 226 times:
I believe Paul Dopson has a CCD cleaning kit, but I also understand that this is very expensive...
Planedoctor From United States, joined Mar 2001, 286 posts, RR: 2 Reply 5, posted (7 years 5 months 3 weeks 5 days 14 hours ago) and read 194 times:
First things first, your D30 has a CMOS! Not a CCD! (Something D30 owners tend to be proud of because it is fairly unique).
Second- to the cleaning... For me, because cleaning the sensor always involves at least a slight element of risk, I think cleaning of the CMOS should be done only when it is absolutely necessary. CMOS dust won't show up in most shots with apertures wider than about f11, and if they do show up, it is only when you have solid bright areas (like sky, unfortunately for aircraft shooters). The best way I have found is finding an area in your house with the least dust possible (for me it is the kitchen because there is no carpet or dust-attracting furniture). Get the camera positioned in a stable position, with it facing down as much as possible. Get a light to help you see the sensor as well as possible. Use a blower of just about any sort that doesn't have the chance of blowing dust particles anything else--I wouldn't use a spray can of compressed air. My favorite is a hypodermic syringe with the needle still on- a big syringe is really good for this. Make sure you are really steady with the syringe and the camera- having a second person helps. Direct the air stream over the CMOS and try to clean it off as well as possible, but be sure you never let the tip of whatever you are blowing with go past the shutter curtains (for the sake of the shutter and the CMOS!) Trying to do this with the camera facing up might work, but for stubborn dust I've had better luck with the camera facing sideways or down.
The reason I do all this instead of sensor swabs is I guess I don't trust any kind of swab touching the sensor yet. Maybe someday I'll do that, but for now little bits of air do the trick.
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(Something D30 owners tend to be proud of because it is fairly unique). 
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