On computer keyboard and sewing machine I use a long, curved eyelash brush. It gets masses of stuff when I can twirl it around. On the keyboard it gets clouds of white Persian hair because a certain cat walks back and forth in front of me when I'm on the computer, crying for attention and tries to do the same when I'm sewing.
I can pull out threads and hairs from the sewing machine and it gets pretty far back down there. I think I'll try to see if the bottom will come off, never thought of that before.