In this article
You pick up your retainer and notice it smells. Not faintly, not occasionally, but every time. It's one of those things people are embarrassed to ask about but almost every retainer wearer experiences at some point.
The good news is that retainer smell is almost always fixable. The bad news is that most people are cleaning their retainer in a way that makes the problem worse, not better. Here's what's actually causing the smell and exactly what to do about it.
Why Retainers Develop a Smell
Your mouth is home to hundreds of different bacteria. While you sleep with your retainer in, those bacteria accumulate on the surface and in the microscopic grooves of the tray. Saliva proteins and food particles that weren't fully removed before putting the retainer in add to the buildup.
Over time, this bacterial accumulation produces volatile sulphur compounds, the same compounds responsible for bad breath. When those compounds embed themselves into the retainer material, the smell transfers to the retainer itself.
The longer the buildup is left without proper cleaning, the deeper it embeds into the material and the harder it becomes to remove. A retainer that gets rinsed quickly but never properly cleaned will develop a persistent smell within a few weeks.
A second cause is calcium deposits. Minerals from saliva gradually deposit onto the surface of clear retainer material over time, creating a white or cloudy film. These deposits trap bacteria and create additional odour-causing buildup that a basic rinse won't remove.
What the Smell Is Telling You
Mild Smell After Removing It in the Morning
This is normal. Your mouth produces saliva containing bacteria all night and some of that transfers to the retainer. A morning rinse and brush should deal with this completely. If the smell is gone after cleaning, your routine is working.
Smell That Persists After Cleaning
This means bacteria or calcium deposits have built up in the material itself rather than just on the surface. Your current cleaning routine isn't thorough enough and a deeper clean is needed. The sections below cover exactly how to address this.
Strong or Unpleasant Smell That Won't Go Away
If your retainer has a strong, persistent smell that remains even after a thorough clean, the material itself has likely degraded to the point where bacteria are embedded too deeply to remove. This is a sign it's time to replace the retainer rather than continuing to clean it.
How to Get Rid of Retainer Smell
White Vinegar Soak
This is the most effective first step for most cases of retainer smell. Mix equal parts white vinegar and cool water in a glass. Soak your retainer in the solution for 20 to 30 minutes. The acetic acid in the vinegar kills odour-causing bacteria and dissolves calcium deposits. After soaking, brush gently with a soft toothbrush and mild soap, then rinse thoroughly. The vinegar smell disappears completely after rinsing.
Retainer Cleaning Tablets
Retainer or denture cleaning tablets dissolved in cool water are highly effective at killing bacteria and removing surface buildup. Drop a tablet into a glass of cool water, soak your retainer for the time specified on the packet, typically 15 to 30 minutes, then rinse well. These are available cheaply at most pharmacies and are a reliable weekly deep clean option.
Baking Soda
Baking soda is mildly alkaline and helps neutralise the acidic bacterial environment that contributes to odour. Mix a small amount with water to form a paste, apply gently to the retainer with a soft brush, leave for a minute or two, then rinse thoroughly.
What Not to Use
Mouthwash might seem like a logical choice for killing bacteria on a retainer, but most mouthwashes contain alcohol which degrades clear plastic materials over time, causing discolouration, brittleness and actually making the smell worse in the long run. Hot water should also be avoided as it warps the thermoplastic material of clear retainers.
How to Prevent It Coming Back
Clean It Every Morning Without Fail
The most important habit is cleaning your retainer immediately after removing it in the morning, before saliva dries on the surface. Rinse under cool water first, then brush gently with mild soap. This takes about 90 seconds and prevents the majority of bacterial buildup from occurring.
Deep Clean Once a Week
A weekly soak in retainer cleaning tablets or a white vinegar solution removes the buildup that daily brushing misses. This is what keeps a retainer genuinely fresh rather than just temporarily odour-free.
Don't Store It While Still Wet
Sealing a damp retainer in its case traps moisture and creates the ideal conditions for bacterial growth. After cleaning, allow your retainer to air dry for a few minutes before placing it back in the case.
Clean the Case Too
A dirty case recontaminates a freshly cleaned retainer every time you put it away. Rinse your case with cool water and mild soap at least once a week and allow it to dry fully before closing.
Remove Your Retainer Before Eating or Drinking Anything Other Than Water
Food particles and sugary or acidic drinks that get trapped in a retainer accelerate bacterial growth significantly. Always remove your retainer before eating or drinking anything other than plain water.
When the Smell Means It Is Time to Replace
If you've done a thorough deep clean using vinegar or cleaning tablets, followed up with consistent daily cleaning for a week or two, and the smell is still there, the material has likely degraded beyond the point where cleaning can fix it. Bacteria and odour-causing compounds have embedded themselves into the structure of the plastic itself.
This is particularly common in retainers that are more than 12 to 18 months old, retainers that have been stored incorrectly, or retainers that have been cleaned with mouthwash or harsh chemicals over time.
At this point, replacement is the right call. Continuing to wear a smelly retainer means putting bacteria-laden plastic in your mouth every night, which is not great for your oral health. Jawology's custom replacement retainers start from $149 with no clinic visit required.
Frequently Asked Questions
Why does my retainer smell even though I clean it?
If your retainer smells despite regular cleaning, bacteria or calcium deposits have likely built up inside the material rather than just on the surface. A deeper clean using a white vinegar soak or retainer cleaning tablets is needed. If the smell persists after that, the material may have degraded enough that replacement is the better option.
Can I use mouthwash to clean my retainer?
Avoid it. Most mouthwashes contain alcohol which degrades clear plastic retainer material over time, causing discolouration, brittleness and ultimately making odour problems worse. Use retainer cleaning tablets or a white vinegar solution for deep cleaning instead.
How do I get rid of the white film on my retainer?
The white film is calcium deposits from saliva. A soak in a 50/50 white vinegar and cool water solution for 20 to 30 minutes followed by gentle brushing is the most effective way to dissolve and remove it. Retainer cleaning tablets also work well for this.
Is it bad to wear a smelly retainer?
A retainer with persistent odour has significant bacterial buildup embedded in the material. Wearing it means reintroducing those bacteria to your mouth every night, which isn't ideal for oral health. If deep cleaning doesn't resolve the smell, replacing the retainer is the right move.
How often should I deep clean my retainer?
Once a week is a good frequency for most people, in addition to a daily rinse and brush routine. If you notice smell developing between weekly cleans, increase the frequency or switch to a more effective deep clean method such as a white vinegar soak.
How do I order a replacement retainer?
Jawology's custom replacement retainers are ordered entirely from home. You take new impressions using the included kit, send them back, and your retainers are made and delivered within 2 to 3 weeks. No clinic visit required. Retainers start from $149 per set.
Keep Your Smile Straight.
Order your custom Jawology clear retainer from $149. No clinic visit required.
Order Your Retainer
