Most CPAP therapy comes down to your machine and mask; accessories are the extras. A few genuinely improve comfort and consistency, most are optional comfort items, and one popular category (ozone and UV "sanitizer" machines) is mostly marketing the FDA has not cleared to clean a CPAP [1]. This guide ranks CPAP accessories by how much they actually help, so you spend on what matters. It sticks to accessories: for the device itself see how a CPAP machine works.
What CPAP accessories actually make a difference, and which are just marketing?
Only a handful of accessories move comfort or adherence for most people; the rest matter only if you have the specific problem they solve. Here is the honest breakdown, with the evidence behind each verdict [1][2][4][5].
| Accessory | Problem it solves | Meaningful or marketing | Who actually needs it |
|---|---|---|---|
| Replacement mask cushion (on schedule) | Leak, lost pressure | Meaningful (essential) | Everyone |
| Heated humidifier + water chamber | Dry mouth, nose, congestion | Meaningful | Most, especially dry climates |
| SD card + free OSCAR data review | No visibility into leaks and AHI | Meaningful (and free) | Anyone tuning therapy |
| Distilled water | Mineral scale in the chamber | Meaningful (about $1) | Everyone using a humidifier |
| Heated tubing | Rainout (condensation in the hose) | Meaningful if you get rainout | Cold rooms, high humidity setting |
| Mask liners | Red marks, minor leaks | Comfort if you get marks | Sensitive skin, facial-hair leakers |
| Hose lift or holder | Tube tug and tangle | Meaningful for comfort | Active and side sleepers |
| Chin strap | Mouth leak on a nasal mask | Meaningful for the right user | Nasal-mask mouth breathers |
| CPAP pillow | Mask shift when side sleeping | Comfort for side sleepers | Side sleepers |
| Travel battery or HME | Power and humidity off-grid | Meaningful for travel; skip at home | Travelers, campers |
| Nasal gel or moisturizer | Persistent nostril irritation | Comfort only | Irritation not fixed by fit |
| Mask wipes and hose brush | Cleaning convenience | Nice-to-have (soap and water works) | Convenience buyers |
| UVC or ozone sanitizer machine | "Kills germs" claim | Mostly marketing (not FDA-cleared to clean a CPAP) | Almost no one |
The accessories that genuinely improve comfort and compliance
Three accessories earn their place for most CPAP users. A heated humidifier is the evidence-based first fix for the dry nose, dry mouth, and congestion CPAP can cause, and it helps most in people who actually have those symptoms [2]; browse CPAP humidifiers and water chambers, and if dry mouth is your issue see how to fix CPAP dry mouth. A hose lift keeps the tube off your body so it does not tug or tangle when you turn, which real side sleepers feel immediately; see hose lifts and tubing. And your SD card plus the free OSCAR software is the most underrated accessory of all, covered in its own section below.
Accessories worth it only if you have the problem
These help a specific person, not everyone. A chin strap is a cheap first try for a nasal-mask user who leaks through the mouth, but a strap alone does not treat sleep apnea [5]. Mouth leak lowers adherence on a nasal mask [6], and a leak a strap does not fix is a reason to move to a full-face mask rather than tighten the strap harder [8]; see chin straps. Heated tubing is worth it to stop rainout in a cold room, but a 12-month trial found it did not improve adherence, side effects, or quality of life over a standard heated humidifier for people who do not get condensation [4]. A CPAP pillow is a reasonable comfort buy for side sleepers who fight mask shift; see the best CPAP pillows and shop CPAP pillows. Mask liners can ease red marks for sensitive skin, though the proven fix for marks and leaks is the right mask size and a fresh cushion; see mask liners. For flying and camping, a travel battery or waterless HME matters; see CPAP backup batteries.
Do you need a CPAP sanitizer? The honest answer
No. The FDA is explicit: "There are currently no FDA cleared or approved devices for cleaning, disinfecting, or sanitizing CPAP machines," and both ozone and UV cleaners "can break down CPAP accessories like hoses and masks" [1]. The agency also warns that ozone can leak into your room and stay above safe limits hours after a cycle [1]. The recommended method is the cheap one: "Most CPAP accessories such as hoses or tubes and masks can be cleaned with only mild soap and water" [1]. Sanitizer machines are among the most heavily marketed CPAP accessories, and the FDA guidance says you can skip them; see how to clean your CPAP the right way. If you want wipes for convenience, they are fine but not better than soap and water: browse CPAP cleaning supplies.
The free accessory almost no one mentions: your SD card and OSCAR
Most CPAP machines record your therapy to an SD card, and the free OSCAR software reads it on your computer. It shows your nightly leak rate, AHI, and pressure so you can see whether a mask swap or a pressure tweak actually worked, instead of guessing. Few competitor buying guides even mention it, and it is more useful than most paid add-ons. If your machine has cellular reporting you may not need the card at all, but keeping one as a backup and learning to read your own data is the best zero-cost upgrade to your therapy.
Maintenance essentials vs comfort extras
Some "accessories" are not optional: they are consumables that keep the machine working. Filters protect the blower and must be replaced on schedule (ResMed calls for a new air filter every six months, and its filters are not washable) [3]; see CPAP filters and the full CPAP replacement schedule. Your mask cushion is the real adherence item: a worn cushion leaks and drops your pressure, so replacing it on schedule matters more than any comfort gadget; see mask cushions and masks. Filters, your mask cushion, and distilled water (below) are the real consumables; the rest of the accessories in this guide are comfort, not maintenance.
Why you cannot use tap water, and the cheapest accessory that protects your machine
Use distilled water in your humidifier, not tap. Tap water leaves mineral scale that builds up in the water chamber and shortens its life, which is why ResMed specifies distilled water only for its standard tub [3]. At about a dollar a gallon it is the cheapest "accessory" you can buy and it protects a part that is expensive to replace. Refill daily and empty the chamber each morning.
CPAP accessories by the problem you are solving
- Dry mouth or nose: a heated humidifier first [2], then a heated tube if you get rainout; skip petroleum-based gels (see the safety note below).
- Red marks or skin irritation: refit and replace the cushion first, then try a mask liner.
- Mouth leak on a nasal mask: a chin strap as a first try, a full-face mask if it persists.
- Tube tug when you turn: a hose lift.
- Travel: a battery and a waterless HME.
- Cleaning: mild soap and water, optionally wipes; not an ozone or UV machine.
One safety note on comfort products: keep petroleum or oil-based ointments (petroleum jelly, medicated chest rubs) away from your nose and mask. Breathing oil-based products in over time is linked to a rare lung condition called exogenous lipoid pneumonia [7]. Use water-based nasal products, and treat dryness at the source with humidification.
Which accessories should you actually buy?
Start with the essentials everyone needs (fresh cushion, filters on schedule, distilled water, and your SD card), add a heated humidifier if you get dry, and only then buy the comfort items that match your specific problem. Browse all CPAP supplies and accessories, or start with the categories that fix the most common complaints:
Frequently Asked Questions
What CPAP accessories are actually worth it?
For most people: a fresh mask cushion on schedule, filters, distilled water, and your SD card with free OSCAR software. Add a heated humidifier if you get dry, and a hose lift if the tube tugs. Everything else is comfort for a specific problem.
Which CPAP accessories are mostly marketing?
Ozone and UV sanitizer machines are the biggest one: the FDA has not cleared any device to clean or disinfect a CPAP, and they can damage hoses and masks. Specialty cleaning sprays and premium-branded wipes also add little over mild soap and water.
Do I need a CPAP sanitizer like SoClean or a UV cleaner?
No. The FDA states there are no cleared devices for cleaning, disinfecting, or sanitizing a CPAP, and ozone or UV can break down hoses and masks. Clean most parts with mild soap and water and replace filters on schedule.
Why can't you use tap water in a CPAP machine?
Tap water leaves mineral scale that builds up in the humidifier chamber and shortens its life, so manufacturers specify distilled water only for the standard tub. Distilled water costs about a dollar a gallon and protects the chamber.
Can I go two weeks without cleaning my CPAP?
No. Wipe the cushion daily and wash the mask, tube, and water chamber with mild soap and water weekly. You do not need a sanitizer machine; soap and water is the FDA-recommended method, plus filter changes on schedule.
Does a chin strap stop mouth leaks?
A chin strap can help a nasal-mask user who leaks through the mouth, and it is a cheap first try. But a strap alone does not treat sleep apnea, and if mouth leak persists the fix is a full-face mask, not a tighter strap.
Do CPAP pillows really help?
There is no clinical evidence a CPAP pillow improves therapy, but it can be a reasonable comfort choice for side sleepers who fight mask shift and hose drag. Treat it as a comfort item, not a leak or therapy fix.
What are the must-have accessories for a new CPAP user?
Distilled water, spare filters, spare mask cushions, and your SD card with OSCAR to watch your leaks and AHI. Add a heated humidifier if you wake up dry. Buy comfort accessories later, only for the problems you actually have.
References
- FDA Consumer Update: Do You Need a Device That Claims to Clean a CPAP Machine? (current 2024): no device is FDA-cleared to clean/disinfect a CPAP; soap and water is recommended.
- Kakkar RK, Berry RB. Positive airway pressure treatment for OSA. Chest 2007: heated humidification can improve adherence, especially with nasal congestion or dryness.
- ResMed AirSense 11 User Guide: replace the air filter every six months (not washable); use distilled water in the standard tub; Climate Control prevents rainout.
- Galetke W, et al. Heated breathing tube during CPAP. Respiration 2016: no improvement in adherence, side effects, or quality of life vs standard heated humidification in nonselected patients.
- Bhat S, et al. Efficacy of a chinstrap in sleep disordered breathing. J Clin Sleep Med 2014: a chinstrap alone is not an effective treatment for OSA.
- Bachour A, Maasilta P. Mouth breathing compromises adherence to nasal CPAP. Chest 2004: mouth leak is associated with lower CPAP adherence.
- Brown AC, et al. Exogenous lipoid pneumonia due to nasal petroleum jelly. Chest 1994: chronic intranasal petroleum use linked to lipoid pneumonia.
- Bachour A, et al. Practical Aspects of Interface Application in CPAP Treatment. Can Respir J 2019: an oronasal (full-face) mask is indicated when leak manifests through the mouth.
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