How to clear out dust in my digital camera lens?

I have a Canon SD450 and when I take night shots, I sometimes get these blurred spots on my pictures. It looks like dust got into my camera through the small crevices and through the retractable lens and is only noticeable while taking night shots. Day shots I guess there's enough light to drown out the dust. The dust is not on the external lens...I've cleaned it with a dust cloth and it's spotless but the spots still appear. Is there a way to blow/suck out the dust from the internal side of the lens?How to clear out dust in my digital camera lens?
Dust inside the lens will be visible in all images as dark spots or blobs.





If the spots are white and occur in flash shots, it's the flash reflecting off particles in the air.How to clear out dust in my digital camera lens?
Look through the lens with a flashlight. If you can see dust, on the inside, then you'll have to take it to a store to have it disassembled and cleaned. Another possibility is dust on the sensor, which will also have to be cleaned by a professional.


However, if the spots are only visible on night shots, then the most likely source is digital 'noise.' Noise are specs of red, green, blue, and gray dots that appear when using high ISO. The higher the ISO, the more noise there will be. There is nothing you can do about this, except use low ISO, or get a new camera with better noise control.

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