dust in my sensor

I just got my nikon D70 kit a few months ago, its a great camera but after 2 or 3 lense swaps i noticed dust spots in my pictures. I've cleaned the sensor myself, twice now, with help from the manual, but the dust still sits there. Right now I'm searching for a place to send my d70 to be cleaned by nikon, but can't find any address or instructions. Can u guys please help me out? thanks

I don't have a D70 so I can't answer the specifics of how to clean that one, but on my Fuji there is a way to lock the mirror up and open the shutter without energizing the sensor. Basically the same as "B" shutter speed but without energizing the sensor. It needs to be done this way because when the sensor is energized it will attract dust. I use a blower bulb (not canned air) and haven't had any problems. I also bought sensor swabs but never got the nerve (or need) to use them. If that fails, try this link:

http://www.nikonusa.com/template.php...to=inc_service