The best humidifier for snoring: what to look for, and what it can't do

The best humidifier for snoring is one that keeps your bedroom between about 30% and 50% humidity, is easy to empty and scrub, and suits how much cleaning you'll realistically do. That matters more than the type or the brand. It's also worth being honest up front: a humidifier can make dry air more comfortable, but we found no study showing it treats snoring. This guide covers the main types, how to set and clean one, what humidity can and can't do for snoring, and what we recommend alongside it.

Does a humidifier help with snoring?

A humidifier may help a little with snoring when dry air is part of the problem, but it isn't a proven snoring treatment. Cleveland Clinic says you're more likely to snore when your airways are dried out, and that dry air can also leave you waking up coughing or with a dry mouth. If your snoring gets worse in winter when the heating is on, dry air could be playing a part.

Most snoring has other causes. The NHS explains that snoring happens when the tongue, mouth, throat or airways in the nose vibrate as you breathe, because these parts relax and narrow during sleep. It says you're more likely to snore if you're overweight, smoke, drink too much alcohol or sleep on your back. It matches treatments to causes: a mouth that falls open, a tongue partly blocking the throat, or blocked or narrow airways in the nose. A humidifier doesn't change any of those directly.

So the fair way to think about it: a humidifier is a comfort tool for dry air, and it may take the edge off snoring linked to dryness. It won't fix snoring that comes from your sleeping position, alcohol, weight or a nose blocked by swelling. Our guide on how to stop snoring covers those causes.

What does the research say about humidity and snoring?

The research on humidity and snoring is thin. We searched the medical literature and found no published study testing a room humidifier as a snoring treatment. Claims that a particular humidifier "stops snoring" aren't backed by trials.

The closest well-reviewed evidence is about colds, not snoring. A 2017 Cochrane review pooled six trials with 387 people who breathed heated, humidified air through a device to treat cold symptoms. None of the trials reported symptoms getting worse, but the results on benefits were inconsistent and the authors rated the quality of the evidence as low. That was a treatment device, not a bedroom humidifier, so it doesn't settle the question either way.

That leaves expert guidance on comfort, which is reasonable but limited. If your mouth, nose or throat feel parched in the morning, a humidifier is a sensible thing to try. Just judge it on how you feel, not on a promise of silent nights. Our earlier guide to humidifiers for sleep covers the comfort side.

What types of humidifier are there?

There are four main types of portable humidifier, and the EPA describes how each one works:

• Ultrasonic models make a cool mist using ultrasonic vibrations.
• Impeller models, often sold as "cool mist", make a mist using a fast-spinning disk.
• Evaporative models use a fan to blow air through a wet wick, belt or filter, adding moisture invisibly.
• Steam vaporizers heat water to make steam. The EPA says "warm mist" humidifiers are a type of steam vaporizer that cools the steam before it leaves the machine.

The type matters mostly for what else ends up in the air. The EPA says ultrasonic and impeller models generally disperse the most microorganisms and minerals from their tanks into indoor air. It says evaporative and steam models can still grow microorganisms in a tank of standing water, but generally disperse less, if any, into the air, and aren't expected to disperse much in the way of minerals.

Steam brings its own risk. The EPA says to keep steam vaporizers out of reach of children, because steam and boiling water can cause burns. That's worth weighing if the humidifier will sit near a bed or in a child's room.

How humid should your bedroom be?

Your bedroom should be somewhere between 30% and 50% humidity. The CPSC recommends keeping home humidity in that range if possible, and the EPA says not to humidify above 50%, because higher levels may encourage biological growth in the home.

More isn't better. The CPSC says humidity above 60% may let moisture build up and condense on surfaces, where bacteria and fungi can grow. The AAAAI says dust mites thrive in warm, humid places like bedding and carpeting, and recommends keeping humidity low for people with dust mite allergies. If allergies make your nose stuffy at night, an over-humid bedroom could leave you more blocked, not less. Our guide to why allergies feel worse at night explains more.

Both agencies suggest measuring rather than guessing. A hygrometer from a hardware store measures humidity, and the EPA notes some humidifiers have a built-in humidistat you can set. If water condenses on windows or walls, the EPA says to move the humidifier, turn it down or use it less.

How do you keep a humidifier clean?

Keeping a humidifier clean is the part that matters most for your lungs. The CPSC says bacteria and fungi often grow in the tanks of room humidifiers and can be released in the mist, and that breathing dirty mist may cause lung problems ranging from flu-like symptoms to serious infection. It flags this as a particular concern for people with allergies or asthma.

The EPA and CPSC give similar advice:

1. Unplug the humidifier before you empty or clean it.
2. Empty the tank, wipe all surfaces dry and refill with fresh water every day. The EPA says this applies to portable humidifiers.
3. Clean portable humidifiers every third day. Scrub the tank with a brush and remove any scale, film or deposits.
4. Follow the manufacturer's advice on cleaning products. If there isn't any, the EPA suggests a 3% hydrogen peroxide solution on every surface that touches water.
5. After using any cleaner, rinse the tank thoroughly with several changes of water so chemicals don't end up in the air.
6. At the end of the season, drain, clean and dry the unit before storing it, then clean it again before you use it next time.

The CPSC says film or scum on the water or tank, or a crusty scale, may be a sign that bacteria or fungi are growing. Cleveland Clinic suggests replacing a humidifier once it has stuck-on mineral deposits you can't clean off.

What is white dust, and should you use distilled water?

White dust is minerals from the water that have been sprayed into the air and settled on surfaces. The CPSC says this dust may contain particles small enough to reach the lungs, and that the health effects of breathing it aren't clear.

The EPA says ultrasonic and impeller humidifiers are very efficient at dispersing tap water minerals, and that minerals also build up as scale, which can become a breeding ground for microorganisms. Both agencies recommend water with low mineral content. The EPA says distillation is the most effective way to remove minerals, and that water labeled "spring", "artesian" or "mineral" hasn't been treated to remove them. Demineralization cartridges and filters are an option if your humidifier is designed for them, but the EPA notes their effectiveness varies widely.

What should you look for in a humidifier for snoring?

The checklist below covers what matters most, with the reason behind each point. We don't recommend a specific humidifier brand.

Who might a humidifier suit?

A humidifier suits people whose bedroom air is genuinely dry, often in winter with the heating on, and who wake with a dry mouth, nose or throat. The ADA lists using a humidifier at night among ways to ease dry mouth, and notes that saliva flow is at its lowest during sleep and that mouth breathing makes dryness worse.

It's less likely to help if your snoring comes from sleeping on your back, alcohol, weight or a nose blocked by allergies or a cold. And it's worth skipping or using with extra care if you have a dust mite allergy, or if you know you won't keep up with cleaning. If you breathe through your mouth because your nose feels tight, the nose is the better place to start. Try our two-minute nose test and read how to sleep with a stuffy nose.

When should you see a doctor?

See a doctor if you snore loudly and someone has noticed gasping, choking or pauses in your breathing, or if you're sleepy in the day despite a full night in bed. The NHS lists these as possible signs of sleep apnoea. See one too if your nose is blocked most nights. If you're pregnant and snoring, mention it to your midwife or doctor. The EPA also says to stop using a humidifier and contact your doctor if you have breathing symptoms you think are linked to it, even if you're cleaning it properly.

We don't recommend mouth tape for children.

Our pick (paid partner): Titan Sleep System

We don't pick a humidifier. Our pick for a snoring routine is the Titan Sleep System, which works on your nose and mouth rather than the air in the room. We haven't tested or ranked sleep products ourselves. This is our recommendation, based on how Titan describes the system.

A humidifier adds moisture to the room. The Sleep System pairs TitanAir Nasal Strips with Titan Bamboo Silk Mouth Tape as one nightly routine. Titan describes the strips as drug-free external nasal dilators with flexible spring-loaded bands, placed just above the flare of the nostrils on the soft part of the nose, and says they're designed to pair with its mouth tape. Titan describes the tape as soft, breathable bamboo silk in one oval size, 76 by 38 mm, worn across the lips.

For someone whose mouth falls open and dries out at night, a humidifier and a routine like this can work side by side, as long as your nose is clear enough to breathe through all night. Titan says its products are third-party tested and PFAS-free, and they come with a 30-night guarantee. You can also buy TitanAir Nasal Strips on their own if you'd rather start with your nose.

Read next

• 9 tips for breathing easier at night when the air is dry
• Why your nose dries out at night and what helps
• Mouth tape and nasal strips together

* This content is for informational and educational purposes only and is not medical advice. It is not intended to diagnose, treat, cure or prevent any disease or health condition. Talk to a qualified healthcare provider about your health.