Gradient - That was a flippant comment on my part. Guy could well know what he was doing with the bulb (although the vacuum cleaner part made me cringe). As for the charged sensor part, that's what cleaning mode is for. When a camera is switched into cleaning mode, the cleaning circuit not only locks the mirror up but also cuts the charge to the sensor array and the static is dissapated. One more really important note for cleaning. This was a killer for a friend. If you don't have the AC adapter for your camera and use a battery while cleaning it, make sure the battery is fully charged and you work somewhat quickly. He was in the middle of cleaning, taking his own sweet time, with the bulb end inside when his battery died on him and the mirror slammed shut, catching the bulb end inside and damaging his mirror. He was not happy.