danza said:If you find dust/hair in the mirror box, the absolute best way to remove it is with a cocktail stick with some masking tape around the end (sticky side out). You just have to gently prod the offernding crud/roll the stick around. That way you don't just shift the dirt around the insides of the camera because it sticks to the tape. You need to make sure you dont jam it into the shutter etc, but it's really not difficult.
My old Nikon D100 was really, REALLY dusty when I got it. The mirror box was almost grey with fluff and dust. I used the above method to clean it, and it looked like new afterwards! The sensor was also quite grotty, but compressed double filtered breathing air sorted that out
Good tip. I'll open it up and have another poke around tonight.