What you describe, sounds like a dirty lens.
Check the lens under good lighting and see if you find a fingerprint on the lens.
Use your breath to add moisture to the lens and they use a clean dry soft lint-free cotton cloth to clean the lens.
Im havin some concerns abt my new sony DSC W50 cam. I bought it 5 months ago..it gave me superb performance in the initial 3 months. Then I started realizing that my pictures are getting grainier. It wont take sharp pics as it used to. I thought may be its because of the noise in the atmosphere.. since I bought the cam in the united states and i came to india after 3 months. now im in the states again and the pics are not yet up to the mark. they are a little better but when I click actual size in windows picture viewer..it all gets grainy. I can judge that by looking at face borders or areas like that... which aren't as sharp as they should be.
Now; I have it set on 6 MP.. auto adjustment mode.. andauto flash. i dont know much abt the settings. can someone guide me here? is there anything wrong with the lense or somethin? or is it just the setting?
I would highly appreciate ur response.