IPod Nano (6th generation) not showing up?

Yeah, mine does that all the time and it's really stupid. I'm afraid you'll have to restore it. /: Plug it back in and click on the iPod thing, then where it shows the iPod's information, click restore. It'll erase all your music, but it'll fix it and you can just put it back on there. If you don't want to do that, then you could try manually doing it? Hold the home button and the menu button (I think) down at the same time until it turns off and then it'll turn back on. Plug it in the computer and see if that helped. If not, you'll probably have to restore it. :O Hope this helped.