Clean the guard and its case consistently before assuming you need a replacement. If odor keeps returning and the guard is rough, cracked, heavily worn or no longer fits correctly, replacement becomes more reasonable.
- Clean the storage case as well as the guard.
- Avoid very hot water unless the manufacturer explicitly allows it.
- Inspect the guard for cracks, roughness and changes in fit.
Why night guards develop odor
Plaque and saliva proteins can form a film on the appliance. If the guard is put into a damp case or only rinsed occasionally, odor can return quickly.
How to remove the smell
Rinse after use, clean according to the manufacturer instructions, allow the guard and case to dry appropriately, and periodically use a material-compatible deep-clean method such as tablets or an ultrasonic cleaner.
When it is time to replace the guard
Replacement is more likely to be appropriate when the guard is cracked, has deep bite marks, feels thinner in high-wear areas, no longer fits securely or remains difficult to clean despite a consistent routine.