Rinse your guard upon removing it from your mouth. This will help saliva from drying on the guard and prevent it from getting dingy. When it is not in your face, it should be in the case! Keep your nightguard away from pets, because they like to chew them up! Do not use retainer or denture cleaners on your guard. It may corrode or distort the plastic, as the guard is softer than dentures and retainers.