For a Brighter, More Confident Smile! Kills Odor Causing Germs br Clean With Efferdent Plus At Least Once A Day To: Kill 99.9% of germs that cause denture odor. 2 Reduce plaque build up and remove food particles that cause gum irritation. 3 Dissolve tough stains in hard to reach places. 4 Keep dentures extra fresh and clean. Works On: Dentures 2 Partials 3 Retainers Questions? Call, Monday to Friday, 9am to 5pm EST.