So I was going to shoot a couple pictures after work today, but I noticed some crap at the bottom of my view, and then I noticed some specks in the middle of the view. I don't know where this stuff is (in the lens? how could it have gotten there? I don't know anything about the insides of cameras). I took the filter off the lens, but the crap didn't change, so it's not on the filter. Does anyone have any advice?