Dentures, false teeth and other oral appliances, like retainers and mouthpieces may be soaked in a Baking Soda (Bicarbonate of Soda) solution made of 2 teaspoons Baking Soda dissolved in a small bowl of warm water. The Baking Soda loosens food particles and neutralizes odors so that dentures or retainers taste fresh! You can also brush dentures and appliances clean with Baking Soda.