my name says it all... this is my first attempt at cleaning my ccd. actually, it was an investigation sort of. (ok, i'm a scardy-cat.) i set my shutter speed to bulb then locked up the mirror in the up position. next, i removed the lens. i took one look inside the d100 and spied what i think is the ccd chip. directly behind the mirror, on the back wall of the camera body i saw... a putty tat (he heh). is that the chip? ok all you first timers out there laughing, wait til it's time for you to clean your dustbunny gathering chip-a-thingy and then we'll see who gets the last laugh.