There is no single calendar date for everyone. Replacement depends on wear, fit, and the material you use. A smart rule is to replace a night guard any time it is worn, damaged, or no longer fits well, and children or teens may need replacements more often as their mouths change (ADA MouthHealthy). 
If you use an over-the-counter or boil-and-bite guard, know that these are not as durable and may need replacing a few times per year (Cleveland Clinic). 
Signs you should replace it now
- Cracks, tears, holes, or thin spots
- Warping or a loose or overly tight fit
- Persistent odor or discoloration after cleaning
- Gum irritation or sore spots that were not there before
- Recent dental work that changed your bite
How to make your guard last longer
- Clean daily, then dry fully. Rinse after use and clean gently. Let it air-dry and store in a ventilated case.
- Do a weekly refresh. Use Night Guard Cleaning + Teeth Whitening Foam or run a quick cycle in the Remi Ultrasonic Cleaner for consistent results.
- Avoid heat. Keep it away from hot water and dashboards.
- Do not chew on it. Chewing shortens lifespan fast.
- Bring it to checkups. Ask your dentist to inspect fit and wear.
Typical timelines to keep in mind
Every mouth is different, but many people find that:
- OTC or soft guards often need more frequent replacement.
- Custom guards can last longer with good care and a stable bite. Ask your dentist to confirm what is realistic for your case.
Time for a replacement?
Protect your enamel with a comfortable Remi Custom Night Guard, and keep it fresh day to day with Night Guard Cleaning + Teeth Whitening Foam.
