Be sure to put some antifreeze on the threads of your nipples, same stuff used on sparkplugs.
As for nipple picks, I've seen people use dental picks, paperclips, and just about anything that will fit through the nipple to clear the channel. I personally stopped carrying something like this years ago, as I always lost it over the course of the day.
Also, be sure to pay attention to your reloading process and don't let yourself be distracted. Otherwise you might be seating balls without any powder in the chamber. Ask me how I know.