Using these guitar picks is easy. Just hold the pick between your thumb and index finger, and you're ready to play. When using, make sure to hold it firmly to avoid it slipping out during a performance. As for maintenance, keep them in a dry place to prevent any damage to the celluloid material. Avoid exposing them to extreme temperatures or sharp objects that could scratch or break them. If they get dirty, you can gently wipe them with a soft, dry cloth.