A proxabrush is a small toothbrush designed to clean in-between the wiring of your braces. It can conveniently stow away in your backpack, pencil bag, pocket, and more, so you don't have to worry about any friends saying, "Hey, you have a piece of cheese stuck in your teeth..." This video runs through how to use a proxabrush.
To keep your brush clean, rinse it after it's been used and keep it in a container to protect the bristles from harm and bacteria.