While mouthwash can help to reduce the bacteria in your mouth that can contribute to tonsil stones, it will not actually get rid of the stones themselves. Tonsil stones are formed when bits of food and other debris become trapped in the nooks and crannies of your tonsils, and they can only be removed through manual extraction or by a medical professional. However, keeping your mouth clean with regular brushing and flossing, as well as using an antibacterial mouthwash, can help to prevent them from forming in the first place.