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A retainer that started out clear and now looks cloudy, chalky or white is a common complaint. In most cases it is build-up on the surface, and it can be cleaned. Sometimes it is damage, and it cannot.
Here is how to tell which one you have.
What the White Film Usually Is
The most common cause is a layer of minerals and plaque. Saliva contains minerals that can harden on plastic over time, in the same way tartar forms on teeth. Plaque bacteria add to it, and hard water can leave its own deposits if you rinse the retainer under the tap.
This kind of film often feels slightly rough, tends to be worse in places that do not get brushed, and usually comes with a stale smell. It is a cleaning problem, not a sign the retainer has failed.
Other Causes of Cloudiness
Scratches. Abrasive toothpaste or a stiff brush can leave tiny scratches that scatter light and make clear plastic look dull. Scratches also give bacteria more places to hold on.
Heat. Hot water, a dishwasher or a hot car can soften the plastic slightly. That can leave it cloudy and can change the shape, so the retainer no longer fits properly.
Age. Plastic wears over time. A retainer that has been used nightly for a long period will often lose some of its clarity.
How to Clean It Safely
Rinse the retainer in cool or lukewarm water each time you take it out. Clean it with a soft toothbrush and a little mild, unscented soap. Rinse it well afterwards.
For a stubborn film, a retainer cleaning tablet used as the packet directs is the usual next step. Some people also soak the retainer briefly in a diluted mix of white vinegar and water to loosen mineral deposits, then rinse thoroughly. Follow the instructions on any product you use. Our guide to cleaning retainers the right way has a full routine, and retainer cleaning solution options compares the choices.
What to Avoid
Do not use hot or boiling water, a dishwasher, or leave the retainer in a hot car. Do not use bleach, or mouthwashes containing alcohol, which can degrade plastic. Do not scrub with abrasive toothpaste, especially whitening toothpaste, or with a hard-bristled brush.
If your retainer also smells, our article on why a retainer smells and how to fix it covers that side of the problem.
When to Replace It
If the cloudiness does not come off after proper cleaning, the surface is probably scratched or the plastic has been affected by heat. A retainer that feels rough, has developed cracks, or no longer fits snugly should be replaced rather than worn. Our guide to how often to replace your retainer covers typical lifespans. Jawology custom retainers start from $169.
Frequently Asked Questions
Is the white film on my retainer harmful?
It is usually built-up minerals and plaque rather than anything dangerous in itself. Still, plaque held against your teeth overnight is not good for them, so it is a sign to clean the retainer more thoroughly.
Can I clean my retainer with toothpaste?
It is better not to. Many toothpastes are abrasive and can scratch the plastic, which makes it look dull and gives bacteria more places to grow. A soft brush and mild soap are safer.
Why does my retainer get cloudy after a few months?
Mineral deposits and tiny scratches build up with regular use, and plastic loses some clarity as it ages. Cleaning daily slows this down.
Does a cloudy retainer still work?
It can, if the cloudiness is only surface build-up and the fit has not changed. If the cloudiness came from heat or the retainer feels loose or tight in a new way, it may no longer be holding your teeth properly.
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