Fresh Guard Soak by Efferdent, Cleans Guards & Retainers, 24 count (3 Pack) - Heading Clean look. Fresh feel. Purpose Oral Care Manufacturer Medtech Prod Directions Take a clean, empty container (e.g. plastic cup or a glass) and fill it halfway with warm water. Then tear open one packet and pour the contents into the water. The solution will foam up and turn blue. Place your retainer, mouthguard, removable braces, or even your plastic case, in the effervescing solution. After about 5 minutes the solution will turn clear when it's ready. Remove your device and rinse thoroughly. The cleaning process will be done after 5 minutes but it's safe to leave your device in the solution longer, even overnight or all day long if you want. Uses Delivers a complete clean you can see, smell, and feel. Removes build-up of mouth film. Removes yellowing and stains. All without causing damage to retainers, mouthguards, and removable braces. Clean look. Fresh feel. Specially formulated. Warnings Keep out of reach of children. Do not put powder or solution directly in the mouth.