As you would do with your natural teeth, dentures also need to be cleaned, both morning and night. This helps remove plaque and other food particles that may build up.
Even if the plaque is not visible, it may irritate your gums. Dentures need to be cleaned on the edges (or on the gum line), and wherever any remaining natural teeth meet the gums. This is most important as as plaque and other food particles tend to build up in these areas. By not cleaning dentures, they can become permanently stained, may cause bad breath, and is mostly unhygienic.