Okay, a strange situation with trying to manually clean the sensor. When I navigate to my Clean Sensor menu, there are only two choices, "Auto Cleaning" and "Clean Now." According to my owner's manual, there is supposed to be a third choice, to "Clean Manually." But it's not showing. I'm not a professional photographer, so maybe there is something painfully obvious I'm overlooking, but darn if I can see it. Any suggestions would be welcome, thanks.