How to Clean a Mouthguard: The Complete Guide for Rugby, Boxing & MMA Athletes
If you wear a mouthguard regularly, keeping it clean is just as important as wearing it. Whether you use a mouthguard for rugby, boxing, MMA, Muay Thai or any other contact sport, bacteria can quickly build up if it's not cleaned properly.
A dirty mouthguard can develop unpleasant odours, become discoloured, and even harbour harmful bacteria that may affect your oral health.
In this guide, we'll show you exactly how to clean your mouthguard, what to avoid, and how to make it last longer.
Why Is It Important to Clean Your Mouthguard?
Every time you train or compete, your mouthguard collects:
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Saliva
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Sweat
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Bacteria
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Food particles
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Dirt from your hands and sports bag
If left uncleaned, these can cause:
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Bad smells
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Staining
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Bacterial growth
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Gum irritation
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Reduced lifespan of your mouthguard
Taking just a couple of minutes after each session can keep your mouthguard fresh and hygienic.
How to Clean Your Mouthguard After Every Training Session
The best routine is simple.
Step 1 – Rinse Immediately
As soon as you've finished training, rinse your mouthguard under cool or lukewarm water.
Avoid hot water as it can distort the shape, especially with custom-fit mouthguards.
Step 2 – Brush It Gently
Using a soft toothbrush, gently brush both the inside and outside of your mouthguard.
You can use:
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Mild antibacterial soap
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Non-abrasive toothpaste (optional)
Avoid whitening toothpastes, which can be abrasive over time.
Step 3 – Rinse Thoroughly
Remove any soap residue by rinsing with clean water.
Step 4 – Let It Air Dry
Place your mouthguard on a clean towel and allow it to air dry completely before putting it away.
Never store a damp mouthguard in a sealed container.
Moisture encourages bacteria and mould growth.
Step 5 – Store It Properly
Keep your mouthguard in a ventilated protective case.
Avoid leaving it:
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In your gym bag for days
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In direct sunlight
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Inside a hot car
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Wrapped in a towel
How to Deep Clean a Mouthguard
Even with daily cleaning, it's worth giving your mouthguard a deeper clean once a week.
You can use:
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Denture cleaning tablets
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Mouthguard cleaning tablets
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A solution of water and white vinegar (followed by a thorough rinse)
Always follow the manufacturer's instructions when using cleaning products.
What NOT to Do
Many athletes accidentally damage their mouthguards by cleaning them incorrectly.
Avoid:
❌ Boiling water
❌ Dishwasher
❌ Washing machine
❌ Bleach
❌ Strong household chemicals
❌ Scrubbing with hard brushes
Heat can permanently warp the fit, making the mouthguard less effective.
How Often Should You Replace Your Mouthguard?
Even with excellent care, mouthguards don't last forever.
Replace yours if you notice:
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Tears or cracks
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Loose fit
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Significant wear
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Persistent odours
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Bite marks affecting protection
If you're still using a boil-and-bite mouthguard that's become loose or uncomfortable, it may be time to upgrade.
Why Choose a Custom-Fit Mouthguard?
A professionally made custom-fit mouthguard offers several advantages over standard boil-and-bite options.
Benefits include:
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Better comfort
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Superior retention
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Easier breathing
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Clearer speech
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Enhanced protection
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Less movement during training
Because custom mouthguards fit precisely to your teeth, they're also easier to keep clean and are less likely to trap debris in poorly fitting areas.
Explore Our Custom-Fit Mouthguards
Frequently Asked Questions
Can I use toothpaste to clean my mouthguard?
Yes, but choose a non-abrasive toothpaste. Alternatively, use mild antibacterial soap.
Why does my mouthguard smell?
Bad smells are usually caused by bacteria building up after training. Cleaning and drying it after every use helps prevent this.
Can I soak my mouthguard overnight?
Only if you're using a product specifically designed for mouthguards or dentures, and according to its instructions. Rinse thoroughly afterwards.
Can I use mouthwash?
Alcohol-free mouthwash can be used occasionally, but it shouldn't replace proper cleaning.
How often should I clean my mouthguard?
Ideally after every training session or match.
Keep Your Mouthguard Performing at Its Best
Cleaning your mouthguard only takes a few minutes, but it makes a big difference. A clean mouthguard lasts longer, smells fresher and helps protect your oral health every time you train.
If you're looking for maximum comfort and protection, a professionally made custom-fit mouthguard is the best investment for serious athletes.