[Mariner (Frank)]

Last weekend I pulled out my 12" Dob (lightbridge) which I have not used for a few months. Although it has been covered and in a storage bag I noticed that the primary was quite dusty - certainly not bad enough to warrant the hassle of cleaning it properly, but dusty none the less. Being very short on time and patience I lightly wiped the mirror (yes I know, I am a foolish, foolish man and well deserve all the condemnation that may come my way) with a very soft cloth from a CD/DVD cleaning kit. I don't know what chemicals, if any, this cloth was impregnated with from cleaning CDs but nothing else was added to it for this wiping and the cloth was dry.

I have very sharp eyesight and even with a very close inspection I could assertain no scratching (probably a miracle I know) on the mirror and the reflective surface looks visually unscathed - very bright, silver and reflective. however, when I tried to view saturn under a higher magnification (15mm Plossl or higher) the image was quite poor (not fuzzy as with poor atmospheric conditions). My 3.5 refractor had a decent image with the same EP. It looked as if the image through the Dob had been smeered/smudged slightly. As I said, I can see no damage at all on the primary but, does this necessarily mean the coating isn't damaged?
I don't know what the next step should be to check whether my mirror needs to be recoated or not? I have not cleaned it properly yet, should this be my next step? I am at a loss.....

PS. The Scope was correctly collimated, the EP and Secondary were both clean as well. There was a lot of moisture in the air and I did not have the mirror fan running (although the evening cooled rapidly I don't think that the lack of forced cooling/airflow would have made any difference).

Thanks very much for any assistance.