3. Carefully draw the once across the surface of the CCD glass with light, consistent pressure.
Rotate the swab 180° and draw it across the CCD surface again.
If pooling or streaks occur, you may have too much alcohol on the swab.
4. Examine the CCD surface in a strong light. Take an out-of-focus picture of a flat, illuminated
surface to see if any dirt or dust remains. If dust or dirt particles are present, they appear as a
soft shadow or dark blemish in the image.
5. If dust spots remain, repeat this procedure using a clean moistened swab.
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