Hold the woodstick firmly between the thumb and first finger, roughly halfway along its length. When possible, place the other fingers for support on the chin. Moisten the tip of the woodstick by sucking on the point of it, thus making it softer and more flexible.
Place the flat side of the woodstick (i.e. not the sharp side) against the gum. In the upper jaw, the flat surface will face upward, and in the lower jaw, it will face downward.
Push the woodstick firmly from the outer side of the space into the space until the stick just becomes wedged. Then, pull it back slightly, and push it back once again, using a light, sawing motion at right angles to the outer surfaces of the teeth. Light pressure can also be applied simultaneously to the gums. Repeat this action a few times, angling the woodstick to contact the surfaces of the teeth enclosing the space.