Camera cleaning is an essential part of digital photography, there are sensors and highly sensitive optics at play when you take a picture, so a few simple cleaning tips is all you need to keep it clean. If you feel that there is actual dust inside of the camera, it is best o take to a special shop where they can clean this area for you.
Camera Cleaning
* Keep the lense clean with a soft cloth, never touch the lense as this can leave finger prints and may cause images to look blurry. If it requires a good clean then use lens cleaning fluid and use a photographic blower brush like the one in the picture above.
* Dont put the camera in any situations where smoke, steam, magnetic fields, sand or chemicals can get in contact with it.
* Dont store it in dirty or dusty places. Avoid any humid places. It is best to buy a camera pouch to store it.
* Dont leave the camera in direct sun light or anywhere where it can get hot.
* Avoid scratching any part of the camera, if the lense gets scratched then it could ruin all future images.
* Always keep dust cap on lenses if they are not being used.
* Never use Paper towels, paper napkins as this can scratch the camera. Facial tissue should not be used to clean the lens of a camera as the fluid and chemicals on the tissue can cause problems with smearing.
http://www.print-digital.info/articles/caring-for-your-digital-camera.html
