Quick answer: The most common SnoreRx complaints are a poor boil-and-bite impression, jaw and tooth soreness, drooling or dry mouth, the device feeling too bulky, wear and tear within months, and frustration with returns and customer service. Most comfort problems come from the fitting process or advancing the jaw too far, too fast, and the maker's own instructions address them. Returns are only accepted on new-customer purchases made at snorerx.com, within 30 days of delivery, and shipping costs aren't refunded.
SnoreRx and SnoreRx Plus are among the best-known adjustable mandibular advancement devices (MADs), and we rate them highly in our SnoreRx review and SnoreRx Plus review. But no mouthpiece works for everyone, and it's worth knowing what goes wrong before you buy. Below we go through the complaints that come up again and again, what usually causes each one, and what to do about it, based on Apnea Sciences' own instructions, FAQ and return policy at snorerx.com, plus the recurring themes in public customer reviews.
SnoreRx Complaints at a Glance
| Complaint | Usual cause | Fix |
|---|---|---|
| Loose fit, falls out, no tooth marks | Water not at a full boil, wrong timing, weak bite | Re-do the impression (allowed twice total) |
| Jaw pain or sore teeth | Advancing too fast; TMJ history | Drop back to 1 mm, go up 1 mm every 3–5 nights |
| Drooling or dry mouth | Normal adjustment period | Wear it while awake for short sessions first |
| Too bulky, can't close lips | One standard size; individual anatomy | Give it a week; consider a slimmer device |
| Wears out or cracks | Clenching or grinding; harsh cleaners | Gentle cleaning; budget for replacement |
| Bite feels different | Known MAD side effect | Stop using it and see your dentist |
| Refund problems | Bought outside snorerx.com, past 30 days, or repeat customer | Check eligibility first; use the official return form |
| Still snoring | Setting too low, or snoring not caused by the jaw/tongue | Advance gradually; see a doctor if it persists |
1. "It doesn't fit" or "It keeps falling out"
This is the complaint SnoreRx itself highlights. On its guarantee page, the company says customers who return their device often didn't take an adequate impression of their teeth, and that a good impression should show prominent teeth marks (snorerx.com/guarantee).
What causes it
- Water that isn't at a full boil. The current instruction booklets say to bring a mug of water to a full boil in a microwave and submerge the device for precisely 60 seconds (1 minute for SnoreRx Plus).
- Heating it in a pan on the stove. The booklets specifically warn against this: the hot metal surface of a pan can damage the material.
- Skipping the cool-water steps. After the hot soak you dip it in tap water for 1–2 seconds, bite down firmly, then set the impression in cool water for 5 minutes.
- Changing the advancement setting before fitting. The booklets say not to change the factory setting until after you boil and bite.
How to fix it
If you don't see well-defined tooth marks, you can repeat the fitting process. The FAQ and booklets say it can be done a maximum of two times, so read the steps (or watch the maker's video) before your first attempt rather than after. Our guide How to Fit an Anti-Snoring Mouthpiece walks through the boil-and-bite process in general.
Also check you're a candidate at all: SnoreRx says the device requires both your upper and lower four front teeth to be natural, and it isn't recommended for denture wearers.
2. Jaw pain, sore teeth and sore gums
Every mandibular advancement device works by holding the lower jaw forward, and that is a new position for your jaw muscles and joints. SnoreRx's FAQ says it is normal to have some soreness in your jaw, teeth and gums during the adjustment phase, and lists sore gums or teeth and pain in the temporomandibular joint (TMJ) among possible side effects.
What causes it
- Advancing too far, too fast. The device moves in 1 mm steps up to 6 mm. The maker recommends starting at the 1 mm setting, staying at each setting for at least 3–5 nights, and only advancing if snoring hasn't improved. Most users, it says, get good results at 3–5 mm.
- An existing jaw disorder. SnoreRx lists a history of TMD (temporomandibular disorder) as a reason not to use it.
How to fix it
Go back one or two settings and let your jaw adapt before advancing again. Mild morning jaw stiffness that eases soon after you take the device out is commonly reported with jaw-advancing mouthpieces early on. But the maker's own guidance is clear: if you have severe pain or discomfort that doesn't fade after a few days, stop using it and contact your dentist or physician. Read Jaw Pain From a Snoring Mouthpiece and How to Adjust a Snoring Mouthpiece for more detail.
If your jaw simply won't tolerate advancement, a tongue device that leaves the jaw alone may suit you better. See tongue retaining devices and TSD vs MAD.
3. Drooling and dry mouth
Excess saliva is listed as a possible side effect, and the FAQ describes dry mouth, a little initial soreness and even excess drooling as "totally normal" when you start. Your mouth treats any new object as food at first and produces more saliva. Others find that their mouth sits slightly open around the device and dries out.
How to fix it
- Wear it while awake before you sleep in it. The SnoreRx FAQ suggests sessions of at least 45 minutes during waking hours for a few days; the SnoreRx Plus booklet suggests 1–3 hours for the first 2–3 days.
- Put a towel on your pillow for the first week or two.
- For dry mouth, a bedroom humidifier and drinking water before bed may help.
For most people the drooling settles as they get used to the device. If it doesn't after a couple of weeks, that's a reasonable sign the device isn't for you, and something to decide while you're still inside the 30-day return window.
4. "It's too big" or "I can't close my lips"
Bulk is a frequent theme in negative customer reviews: people say the device crowds the tongue or feels like too much plastic in the mouth. SnoreRx comes in one standard size, which the maker says accommodates most jaw sizes, and its FAQ acknowledges that some people can close their lips over it while others can't. Its V-Flow design allows full mouth breathing either way.
What you can do
- Give it the full five nights the maker suggests for getting accustomed to it.
- Consider SnoreRx Plus if the original feels too rigid: it is designed to allow vertical jaw movement. Our SnoreRx vs SnoreRx Plus comparison explains the differences.
- If you have a small mouth, a device offered in more than one size, or a slimmer non-boil design, may be more comfortable.
5. "It wore out in a few months" or "a piece broke"
Durability complaints (rough or torn material, parts separating, cracks after a few months) show up in public reviews. SnoreRx's FAQ says the device typically lasts around 6 to 11 months of use, while noting it can't guarantee a specific lifespan, and that people who grind their teeth or clench their jaw may wear it out much sooner than 6 months. The FAQ also states SnoreRx is FDA-cleared only for reducing snoring and is not intended to treat tooth grinding or clenching.
How to make it last
- Brush it gently with a toothbrush and toothpaste after each use and let it air-dry in its case.
- Avoid harsh chemicals and abrasive cleaners; the maker names ammonia, bleach and alcohol-containing mouthwash.
- Keep it away from heat (hot cars, dishwashers, boiling it again outside of fitting).
- If you're a heavy grinder, talk to your dentist about whether a custom appliance would hold up better.
6. Teeth or bite feel different
"Tooth movement or change in dental occlusion" is listed among SnoreRx's possible side effects, as it is for mandibular advancement devices in general. A slightly "off" bite for the first few minutes after you take the device out in the morning is common with MADs. A change that lingers is not.
The maker's booklet advises telling your dentist you use the device and having them monitor your teeth, gums and jaw at your regular checkups, and says to stop using the device and notify your dentist if you notice tooth movement, changes in your bite, persistent pain or discomfort. More on this in Are Snoring Mouthpieces Bad for Your Teeth?
7. Return and refund frustrations
Many of the angriest reviews are about money, not the mouthpiece. Most of those disputes trace back to the terms of the guarantee, so read them before you order. According to snorerx.com's guarantee page and terms and conditions (checked October 2026):
- The 30-night money-back guarantee is for new customers purchasing through snorerx.com.
- The return window is 30 days from the delivery date (the terms say returns must be postmarked within 30 days of delivery).
- Shipping and handling charges are non-refundable, and you pay for return shipping.
- The company states it does not accept returns of purchases from any retail channel except snorerx.com.
- Replacement devices aren't eligible for return and don't extend the 30-day period.
- Your order number must be on the outside of the returned package. Returns are processed within ten business days of receipt, with refunds expected 5–7 business days after processing.
- If you refuse delivery of an order, the terms say you're responsible for shipping costs plus a 20% restocking fee.
How to avoid refund trouble
- Buy from the official site if the guarantee matters to you. (See where to buy SnoreRx.)
- Note your delivery date and decide by about night 20, leaving time to post it back.
- Start the return through the official Request a Return form on the guarantee page so there's a record.
- Ship with tracking, write the order number on the outside, and keep the receipt.
- Keep copies of every email. If a refund doesn't appear after the stated processing times, follow up in writing.
8. Shipping delays and customer service
On public review sites, slow shipping, slow replies and refund follow-ups are among the most common complaints. For context, the snorerx.com page on Trustpilot (which the company hasn't claimed) had a low score from fewer than 100 reviews when we checked in October 2026, with most negative reviews about service and refunds rather than the device, while the company's own collected reviews skew strongly positive. Neither sample is large or random, so treat both with caution.
What the company states about shipping: US orders ship from Southern California, with USPS First Class quoted at 3–7 business days and FedEx overnight and 2-day options. Orders placed before 2:00 PM Pacific on business days ship the same day. Orders to Canada and Australia are shipped by a local fulfillment warehouse. International customers pay any customs duties and taxes, and USPS International can take up to 21 days.
Double-check your address at checkout: the terms say an incorrect or incomplete address can result in a fee of up to 20% of the order value. The published support contacts are 1-800-546-1984 and support@snorerx.com.
9. "It didn't stop my snoring"
Some people return SnoreRx because snoring continued. Common reasons:
- The setting is too low. The device starts at 1 mm and the maker suggests most people need 3–5 mm. Advance one step at a time, 3–5 nights per step.
- The snoring isn't coming from the tongue and jaw. Nasal congestion or other causes may need different treatment.
- It's not just snoring. SnoreRx is FDA-cleared to reduce snoring, and its booklet states it is not a treatment for sleep apnea. If you have gasping, choking, witnessed breathing pauses or daytime sleepiness, see a doctor. Read Can Snoring Mouthpieces Treat Sleep Apnea?
Who Shouldn't Use SnoreRx
A lot of complaints come from people the device isn't designed for. SnoreRx's FAQ and booklet say it should not be used by people who:
- Have central sleep apnea
- Are under 18
- Have a history of TMD (temporomandibular disorder)
- Have a respiratory disorder
- Have loose teeth, abscesses, severe gum disease or advanced periodontal disease
- Wear dentures, braces or other dental appliances
- Have implants, crowns or bridges, unless their dentist approves
When to Stop Using It and See a Dentist
- Severe jaw, tooth or gum pain that doesn't fade after a few days
- Your bite still feels different hours after removing the device
- Teeth that feel loose, or gum sores that don't heal
- Jaw clicking, locking or pain when chewing that's new
- Signs of sleep apnea (stopped breathing, gasping, heavy daytime sleepiness); see a physician
Our Take
Most SnoreRx complaints fall into two groups. Comfort issues (fit, soreness, drooling) are common to every boil-and-bite MAD and usually respond to a careful impression, a slow adjustment schedule and a week or two of patience. Service issues (refunds, shipping, response times) are best avoided by buying direct, understanding the 30-day, new-customer, snorerx.com-only guarantee, and keeping records. If you've given it a fair trial and it still isn't right, return it within the window and try a different design.
FAQ
What are the most common SnoreRx complaints?
Poor boil-and-bite fit, jaw and tooth soreness in the first weeks, drooling or dry mouth, the device feeling bulky, wear within months (especially for teeth grinders), and difficulties with returns, shipping or customer service.
Is jaw pain from SnoreRx normal?
Some soreness in the jaw, teeth and gums during the first few nights is normal according to the maker. Start at the 1 mm setting and advance only 1 mm every 3–5 nights. If pain is severe or doesn't fade after a few days, stop using it and see your dentist.
Can I re-mold SnoreRx if the fit is bad?
Yes, but only once more. The fitting (boil-and-bite) process can be done a maximum of two times in total, so follow the instructions carefully: microwave the water to a full boil and avoid heating the device in a pan on the stove.
Does SnoreRx give refunds?
Yes, for new customers who bought at snorerx.com, if returned within 30 days of delivery. You get the product price back; shipping and handling aren't refunded, you pay return shipping, and purchases from other retail channels aren't accepted for return.
How long does a SnoreRx last?
The maker's FAQ says around 6 to 11 months of use, varying by person. Grinding or clenching can wear it out much sooner.
Is SnoreRx bad for your teeth?
Like all mandibular advancement devices, it can cause tooth movement or bite changes in some users. Tell your dentist you're using it, keep regular checkups, and stop using it if your bite changes or pain persists.
