How long should it take to clean the sensor? Unfortunately I don't have the AC adapter and I keep running out of battery during the cleaning. Sometimes takes 2-3 hours or more, is this normal? How long should it take if I have the AC adapter?
I think you misunderstand the "Sensor Clean" menu item. It doesn't clean the sensor for you. It only opens the shutter so you can go in with the blower, brush, swabs of your preferred sensor cleaning toolse. When you've finished blowing off, brushing out or swabbing down the sensor you then turn the camera off again.
Actually, it's so dang easy, I just do it everytime I notice any spots. Mind you, I've only done dry cleaning, so I'm not too sure how I'd feel if I had to do wet everytime.

Hope you clean it soon!
