Got elmers? That's what I wud do.
I use Superglue, when I can get the cap off ...
Actually, Super Glue is just the ticket for this... but, I lost the nail. I was pickin' up a box of troop stuff and that nail broke and I can't find the broken end or I'd Super Glue it back. Is that TMI? :-)
It wouldn't work to scratch your back like that... but I could type. (I still have all the nails on the other hand. Can still scratch.)