If you are like most people, you probably have a few retainers in your dental collection that you don’t use very often. But before you toss them in the trash, there is a way to clean them and make them usable again. To clean a Vivera retainer, fill it with warm water and soap. Swish the water around and then scrub the inside of the retainer with a soft cloth or toothbrush. Be sure to get into all the crevices. Finally, rinse it off and dry it off. ..