I think that there is some dirt on my CCD sensor, can I clean it myself?

Dust on the surface typically shows itself as discrete dark spots on a flat field image. They will normally be removed during processing by using a flat field frame correction. We have a guide to identifying where dust might be in your optical train and basic camera cleaning under Maintenance on our Tutorials page. If you wish to have the CCD cleaned please contact our support team on through out technical support form here.