Gradient - Sounds like a guy who didn't understand how to use the bulb to clean it. :) For those who don't know, make sure that after you switch your camera into cleaning mode and before you start puffing air inside it that you turn the camera upside down (meaning the lens mount and opening point down). So that when you puff air into it, the dust falls down and out of the camera. Otherwise you're just blowing dust around inside the chamber. And before you stick anything into your DSLR, remember that despite what some might think, the array in your camera is not covered by a protective glass layer. It's covered by the anti-aliasing filter. Damage that and dust will be the least of your problems. -=>Donald