1. If the shoelace of the rotary button is broken, you can drop some 502 super glue on it. Be careful not to drip too much, or the toe will be too thick to penetrate the hole. When the glue dries, the shoelaces become hard, and then they can't be easily damaged.
2. Start by lighting the shoes with a lighter, then quickly light the whole straw with your hands, and finally use the lighter and pinch it quickly, so it will be fixed and will not fall off.