Works On. Dentures. Partials. Retainers. Kills 99.9% of Odor-Causing Germs. Fights Odors • Removes Stains. Clean with Efferdent Plus Denture Cleanser at Least Once a Day To:. . • Kill 99.9% of the germs that cause denture odor. • Reduce plaque buildup and remove food particles that can cause gum irritation. • Dissolve tough stains in hard-to-reach places. • Keep dentures extra fresh and clean.