I have a camera with a scratched sensor (a Canon 1Ds Mk II) - can I clean the dust from the sensor? And if yes, how? By using the wet method? Or just by blowing air?
The scratch is in the middle. Perhaps it is better to avoid that area?
I'm not particular familiar with that specific camera but I would suggest taking it in to get the glass cover replaced. There are companies that specialises in such things. Check this thread out for details: http://www.fredmiranda.com/forum/topic/664948.
In all likelihood the scratch will be on the glass directly above the sensor rather than on the sensor itself, so it shouldn't be massively expensive.