Yes. Should you have to fire your blingsting, it is recommended that you replace it. While there are about 10 brief shots of pepper spray in each unit, the shelf-life decreases dramatically after one use. It’s better to be safe than sorry, and to make sure you have a full blingsting at all times. To replace, simply pull apart the pepper spray insert from the decorative cover and replace with a new 1/2 ounce insert until you hear a ‘popping’ sound. That means it’s all the way in.