Fresh Guard Soak by Efferdent is specially designed to clean the delicate materials used in retainers, mouth guards, clear braces, and other removable braces to deliver a complete clean. Give your removable braces, retainer or mouth guard a total clean. Fresh Guard Soak kills 99.9% of odor-causing bacteria in just 5 minutes. Many of today's current methods simply weren't designed to clean these devices and don't clean as well as patients like, sometimes even causing damage. Watch Fresh Guard work before your eyes as the foaming blue solution turns clear within 5 minutes, indicating your retainer, mouth guard or removable braces are clean.