Just finished cleaning the sensor on my DSLR, and found that the mirror is leaving a lot of crap behind. Tried a continuous mode firing sequence while pointing at a clear blue sky, and a previously pristine sensor became a carpet of lint.
I zoomed in to a part of the sensor that normally seems to gather stuff, and rolled through the frames. Each frame got progressively dirtier. Changed to JPEG/Basic, so my buffer lasts longer, then held down the shutter button until the buffer filled, again facing up.
Ran through another cleaning cycle, and repeated the firing sequence. It was much better this time. Cleaned one more time, made sure all my setting were correct (including the image quality), and put it away.
I should send this body in for cleaning. The camera, too. But, I think I got rid of that wild hair that was showing up at the top of my frames...