Some people advocate carefully cleaning the sensor but others recoil in horror that they even suggest it. It's probably entirely safe using a can of compressed air sold by photo shops - just use extreme care. There are many threads on this in the various aviation forums. bones bones@xxxxxxx -----Original Message----- From: jhb-bounce@xxxxxxxxxxxxx [mailto:jhb-bounce@xxxxxxxxxxxxx] On Behalf Of Gerry Winskill Sent: 05 October 2009 18:38 To: JHB Restricted Subject: [jhb] DSLR Clean My D80 has had a slight blur, about 10 o'clock, on images, for some time. It's noticeable only on shots with clear grey sky in that area. It has the appearance of a small droplet, so I don't think it's a dodgy pixel. So, does anyone clean his own sensor filter, or is it best left to a camera shop? Gerry Winskill