Post- Op Instructions for Night Guards DO NOT! soak in mouthwash, denture cleaner, or hot water. DO NOT! place in direct sunlight. DO rinse well with warm water before & after use and store dry. DO clean appliance with soap and warm water ONLY. If it becomes loose, tight, or causes you any discomfort, please contact us at (512)252-4746 to set an appointment for an adjustment. Bring your night guard to your cleaning appointments for routine checks.