White buildup on retainers

What causes it

Saliva contains minerals, including calcium, that can harden on surfaces over time. Plaque and bacteria can settle on the same spots, which makes the film look more obvious. Clear plastic shows this more than acrylic does, but both can develop it.

Gentle cleaning that works

• Rinse with cool water every time you take the retainer out.
• Brush with a soft toothbrush, mild unscented soap, and light pressure.
• Clean every day rather than waiting for buildup to appear.
• Dry it and store it in a clean case.

What not to do

Scrubbing hard, scraping with metal or a knife, and using abrasive powders all leave scratches. Scratches create tiny ridges where plaque gathers, so the retainer can look cloudier over time. Avoid any product your orthodontic team has not recommended.

Professional cleaning

Your orthodontic team or dental hygienist can advise on approved deep-cleaning options. Bring the retainer to your next visit and ask what they recommend for your type.

When to call your team

Contact your team if buildup returns quickly, the surface feels rough, or you can see scratches or cracks. Those changes can affect how the retainer fits.