Bad Breath From a Clean Mouthguard? Here's Why It Happens
You're doing everything right — you wash your night guard, keep it in its case, and even brush your teeth like you're prepping for a dental commercial. Still, there's that smell. And the worst part? You're not sure if it's coming from your breath or the mouthguard itself.
Turns out, bad breath can still creep in even when your mouthguard looks spotless. This blog breaks down why it happens, how to stop the odor for good, and where ClearClub fits into the solution.
📑 Table of Contents
Other Causes of Bad Breath From a Mouthguard (Even When Clean)
Bacteria Buildup in Micro-Cracks
A mouthguard can still carry bacteria even if you clean it regularly. Over time, constant grinding creates tiny cracks in the material, and those spaces can trap odor-causing bacteria. This buildup is hard to reach with a regular cleaning routine, which is why a mouthguard can still smell even when it looks clean.
Improper Mouthguard Drying and Storage
Cleaning Mistakes: Toothpaste and Hot Water
Don't get it twisted: cleaning your mouthguard is a step you shouldn't skip in your oral care routine. What you should skip, though, is thinking that abrasive toothpaste and scalding water are a quick fix. The most effective night guard hygiene is using an anti-microbial soap and a soft-bristled toothbrush. This prevents creating tiny surfaces where odor-causing bacteria can latch on.
How Saliva Composition Affects Mouthguard Odor
Saliva plays a major role in both digestion and oral health. According to the Cleveland Cinic, it lubricates your mouth and throat, helps repair teeth and gums, and protects you from infection and even loss of taste. Since saliva is made up of 99% water and 1% protein, not staying hydrated can reduce how much saliva your body produces — which means you don't have enough of it to wash away odor-causing bacteria.
Diet and Foods That Cause Mouthguard Bad Breath
No matter how often you brush your teeth, your diet still plays a huge role in how your teeth smells. WebMD lists garlic, onions, coffee, and alcohol as some of the most common culprits since they're packed with sulfur compounds and high acidity — substances that can linger to your breath long after eating or drinking, and even settle into the tiny cracks of your mouthguard.
Effective Ways to Clean Your Mouthguard and Prevent Odor
Tip #1: Improve Oral Hygiene to Prevent Mouthguard Odor
Remember how diet can affect your breath? Leftover crumbs can, too! Keep food from getting stuck between your teeth and gums by brushing twice a day and flossing daily. To take your routine up a notch, try a cleaning and whitening foam — it sanitizes your mouthguard, whitens your teeth, and can even be worn overnight.
Tip #2: Proper Mouthguard Cleaning Techniques
Use the right tools to keep your mouthguard clean and in good condition. Tiny cracks can harbor bacteria, so prevent them by cleaning with an anti-microbial soap and a soft-bristled toothbrush. This gentle method helps your mouthguard last longer.
Tip #3: Proper Drying to Avoid Mouthguard Bacteria
Storing your night guard right after washing can let bacteria, fungi, and mold grow — both on the surface and in places you can't see. Always let it dry completely before putting it in its case.
Tip #4: Replace Mouthguard to Maintain Hygiene
With proper care, a mouthguard usually lasts 3-6 months. Using it beyond this period can reduce its effectiveness and may irritate your teeth and gums — especially if it has developed cracks or chips.
Keep Your Mouthguard Clean and Your Smile Safe With ClearClub Mouthguards and Cleaning Foam
If you're looking to improve your mouthguard's hygiene and maintenance, ClearClub has the right options. When replacing your night guard, choose from our Clear, Color, or Multi-Color options — designed for comfort without compromising protection. You can also sanitize your mouthguard with our Cleaning + Whitening Foam to prevent bad breath. It's safe for sensitive teeth, swallowable, and wearable overnight.
You can also subscribe to our renewal plan to receive fresh guards or new foam every 3, 4 or 6 months. Keep bacteria in check and protect your smile with ClearClub today!
Frequently Asked Questions
❓ Why does my mouthguard smell even after cleaning it?
Because your mouthguard likely has tiny cracks and openings that your brush and soap can’t fully reach. Odor-causing bacteria can grow in those spots, making your mouthguard smell even if it looks clean.
❓ Can mouthguards cause bad breath even when they’re new?
Yes. Bad breath can still persist even if your mouthguard is new. Diet and oral hygiene also play a role in maintaining your guard’s odor — it’s crucial to brush or floss your teeth first before wearing it to prevent food residue and sulfur-producing bacteria from sticking to your guard.
❓ Can the way I store my mouthguard cause odor?
Yes. Storing your mouthguard when it’s still damp can cause bacteria and fungi to grow on its surface. These microorganisms can cause bad breath, gum irritation, and gingivitis.
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