HomeNight GuardsHow to clean a night guard
How to Clean a Night Guard
A guard spends eight hours in your mouth and comes out with a film on it. Cool water, a soft brush and a dry case is the whole daily routine. What ends a guard early is heat, not dirt.
A tube of foam and a mirror case come in the box with your guard. The three bottle refill is $24.99 and the ultrasonic bath is $54.99.
See the cleaning foamThe guard itself
- Cool water only
- Soft brush, no paste
- Dry case between wears
- Never hot water
Every morning, at the sink
- Rinse it coldCool water the moment it comes out, before saliva and plaque have a chance to dry on the shell.
- Brush it clearA soft brush over every face, inside and out. Foam or any mild cleaner with no grit in it. Never toothpaste.
- Dry it and park itRun it clear, dry it off and set it in its case. A wet guard shut in a case is how the smell starts.
Brush your own teeth before the guard goes back in at night, so nothing gets sealed underneath it.
Once a week, a longer clean
A brush moves the film around. Once a week something has to lift it off, and that is all the weekly step is for. Pick a day and keep to it, and clear plastic stays clear for the life of the guard.
Cleaning foam
Pump it onto a wet guard, brush it over every face and rinse until the water runs clear. Your first tube came in the box, this is the three bottle refill.
$24.99
Ultrasonic bath
Cool water, a few minutes, hands off. It reaches the grooves a brush cannot, and it is the easier weekly habit to keep.
$54.99
Sterilization case
Dry storage with UV lamps in the lid. A care case with a mirror already comes free in every order.
$29.99What never touches a night guard
Most guards are not worn out. They are killed in one wash. Everything on this list does its damage the first time.
Boiling water and the dishwasher
Heat pulls the shell out of shape, and a warped guard never seats on your teeth again. Cool water only, every time.
Bleach and strong alcohol
Both go after the surface and the colour. Clear plastic turns cloudy and stays that way. Mouthwash with alcohol counts here too.
Abrasive toothpaste and a hard brush
The scratches they leave are exactly where stain moves in for good. A soft brush and a cleaner with no grit is the whole rule.
A hot car and a sunny windowsill
A dashboard in Florida gets hotter than a kettle. The case goes in the bathroom, not the glovebox.
Why the white film keeps coming back
The chalky white haze on a guard is not dirt that a harder scrub would shift. It is mineral out of your own saliva, laid down layer by layer the same way it settles inside a kettle. Scrubbing polishes the surface and leaves the mineral where it is.
What lifts it is a soak or an ultrasonic bath, both of which work on the deposit rather than on the plastic. A denture cleaning solution once a week does the same job. Rinse hard afterwards and let it dry, because anything left on the shell goes back into your mouth that night.
If the haze has set in so far that a weekly clean no longer clears it, the shell is usually near the end of its life anyway. Your mold stays on file for two years, so a replacement needs no new impression from you.
When cleaning is not the answer
A guard is a part that gets replaced. Grinding wears the shell down instead of your teeth, which is the job, and a shell that has done that job is finished. Replace it when it thins through, when it cracks, or when it stops seating the way it did on the first night. A fresh night guard starts at $119 an arch.
A crack with nothing dropped behind it is a fault in the build, and that stands for 60 days from delivery once a technician has verified it. Anything that presses or shifts in the first 30 days is adjusted free.
General care for every appliance we make, flippers and partials included, sits on the care and use page.
Questions people send us first
How to clean a night guard every day
Rinse it under cool water the moment it comes out, brush every face with a soft brush and a mild cleaner with no grit, rinse it again and dry it in its case. That is the whole daily routine and it takes under two minutes. Which build you are cleaning changes nothing here, and the three are compared in soft, hybrid or muscle relaxer.
How often to clean a night guard
Every morning without exception, and once a week a longer clean with foam, a denture cleaning solution or the ultrasonic bath. A guard that sat unused in its case for a stretch gets the weekly clean before it goes back in, not after.
What to use to clean a night guard
Cool water and a soft brush daily. Weekly, cleaning foam at $24.99, a denture cleaning solution, or the ultrasonic bath at $54.99. Nothing abrasive and nothing hot.
Whether toothpaste can be used on a night guard
No. Toothpaste is mildly abrasive by design, and the scratches it leaves in the shell are exactly where stain settles for good. A cloudy guard is usually a guard that was brushed with paste.
How to get the white film off a night guard
The white haze is mineral out of your saliva rather than dirt, so scrubbing does not shift it. Soak it in a denture cleaning solution or run it through an ultrasonic bath, then rinse hard and dry it. If a weekly clean no longer clears it, the shell is near the end of its life.
Whether a night guard can go in boiling water to sterilise it
Never. Heat pulls the shell out of shape and a warped guard does not seat again, so one hot wash ends it. The same goes for the dishwasher, a kettle and a hot dashboard.
Why a night guard smells
It was put away wet, or it went back in over unbrushed teeth. Dry it before it goes in the case, brush your own teeth first, and give it the weekly clean. A smell that survives all three means the film has set into scratches and the shell wants replacing.
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Prices checked in September 2026.