What are the sticks that come with a recorder for?

The sticks that come with a recorder are called cleaning rods. They are used to clean the inside of the recorder, removing any moisture or debris that may have accumulated. To use the cleaning rod, insert it into the end of the recorder and gently push it through. Be careful not to force the rod, as this could damage the recorder. After you have pushed the rod through, remove it and wipe it clean with a soft cloth.