How to Clean a CPAP Machine: Step-by-Step Guide from a Respiratory Therapist
How to Clean a CPAP Machine: Step-by-Step Guide from a Respiratory Therapist
CPAP cleaning is the part of sleep therapy that most patients either overcomplicates or ignores entirely. Both extremes cause problems. Neglect your cleaning routine and you're building a warm, moist environment that grows mold, bacteria, and mineral deposits directly in your airway delivery system. Overcomplicate it with expensive automated cleaners and you may actually be damaging the equipment you paid hundreds of dollars for.
The truth is that proper CPAP cleaning takes under five minutes per day and about fifteen minutes once a week. It requires nothing more than mild soap, warm water, and a clean towel. Here's exactly how to do it correctly, how often, and what to avoid.
Why CPAP Cleaning Matters Clinically
Your CPAP humidifier chamber sits at body temperature with standing water in it every night. Your mask cushion collects skin oils, dead skin cells, and moisture every session. Your tubing is a dark, warm, enclosed environment where condensation collects. Left uncleaned, these surfaces develop biofilm — structured communities of bacteria and fungi that adhere to surfaces and are significantly harder to remove than planktonic (free-floating) bacteria.
The clinical consequences of inadequate CPAP cleaning include:
- Respiratory infections — bacterial or fungal pneumonia in immunocompromised patients; upper respiratory infections in otherwise healthy users
- Sinus infections and nasal irritation — from inhaling aerosolized contaminated water vapor
- Accelerated component degradation — mineral deposits from tap water damage the humidifier chamber's heating plate; skin oils degrade silicone cushions faster
- Mask seal failure — oil buildup on cushion surfaces reduces the silicone's tackiness, actively promoting mask leaks
Regular cleaning is not optional maintenance. It's part of the therapy.
What You Need
No special equipment required. The following is everything you need for a complete CPAP cleaning routine:
- Mild, fragrance-free liquid dish soap (Dawn free & clear or equivalent)
- Warm water (not hot — hot water warps plastic components)
- A clean sink or basin
- A soft cloth or paper towels
- A clean, dry towel or drying rack
- Distilled water for the humidifier chamber (not tap water)
That's it. You do not need ozone cleaners, UV sanitizers, or automated CPAP cleaning machines. More on why shortly.
Daily Cleaning Routine (5 Minutes)
Do this every morning when you remove your mask:
Step 1: Empty and Rinse the Humidifier Chamber
Remove the HumidAir chamber from the left side of your machine (on ResMed AirSense 10/11 — it slides straight out). Open the lid and pour out any remaining water. Rinse the chamber with warm water, swirl, and empty. Leave the lid open and set it aside on a clean towel to air dry completely before the next session.
Never leave standing water in the chamber between sessions. Overnight water sitting in a warm chamber is a primary source of bacterial and mold growth. Empty it every morning without exception.
Step 2: Wipe the Mask Cushion
Using a damp cloth or CPAP mask wipe, gently clean the inside surface of your mask cushion — the surface that contacts your face. This removes skin oils and moisture before they have a chance to degrade the silicone and reduce seal quality. Let the cushion air dry before storing.
Step 3: Wipe Down the Machine Exterior
A quick wipe of the machine exterior with a damp cloth keeps dust from being pulled into the air intake. This takes 20 seconds. Don't skip it.
Weekly Cleaning Routine (15 Minutes)
Once per week, do a full wash of all patient-contact components:
Step 1: Disassemble Everything
Disconnect the tubing from the machine and the mask. Separate the mask into its components: cushion, frame, and headgear (most modern masks separate easily without tools). Remove the humidifier chamber from the machine.
Step 2: Wash the Humidifier Chamber
Fill the chamber with warm water and a small amount of mild fragrance-free soap. Swirl thoroughly, ensuring the soap reaches all interior surfaces including the lid. Let it soak for 5 minutes. Rinse thoroughly with clean water until no soap residue remains — soap residue left in the chamber gets aerosolized into the airstream during therapy. Set aside to air dry completely, lid open, on a clean towel.
Step 3: Wash the Tubing
Fill your sink or a basin with warm soapy water. Submerge the tubing and run soapy water through the interior by submerging one end and allowing water to flow through. Let it soak for 5 minutes. Rinse by running clean water through the tube several times until the water runs clear and odor-free. Hang the tubing to dry over a shower rod or towel rack — it needs to dry completely inside before next use. Never seal a damp tube — trapped moisture inside creates ideal conditions for mold growth.
Step 4: Wash the Mask Cushion and Frame
Wash the cushion and frame in warm soapy water, using your fingers to gently clean all surfaces. The cushion particularly needs attention where it contacts your nose, mouth, and cheeks. Rinse thoroughly. Air dry completely — do not reassemble a damp mask.
Step 5: Wash the Headgear
Headgear can be hand-washed in mild soapy water or placed in a lingerie bag and run through a gentle machine wash cycle on cold. Air dry only — never put headgear in a dryer. High heat degrades the elastic and reduces its ability to maintain proper tension, which directly affects mask seal quality.
Step 6: Check the Air Filter
The ResMed AirSense 10 and AirSense 11 have a foam air filter accessible from the rear of the machine. Remove it and inspect it. If it's gray, dusty, or visibly dirty, replace it. A clogged air filter forces the motor to work harder (increasing noise and reducing lifespan) and reduces the quality of air being processed. Most manufacturers recommend filter replacement every 1–3 months depending on your environment. If you have pets or live in a dusty environment, check monthly.
Component Replacement Schedule
Cleaning extends component life, but all CPAP components are consumables with finite lifespans. No amount of cleaning recovers a degraded silicone cushion or stretched headgear.
| Component | Replace Every | Signs It Needs Replacing |
|---|---|---|
| Mask cushion / nasal pillows | 1–3 months | Stiffness, discoloration, persistent leak despite good fit |
| Headgear | 6 months | Straps stretched, velcro worn, poor tension |
| Mask frame | 6–12 months | Cracks, broken clips, warped plastic |
| Tubing (standard) | 3 months | Cracks, discoloration, persistent odor despite cleaning |
| Heated tubing | 6 months | Same as above plus wire inspection for kinking |
| Humidifier chamber | 6 months | Mineral scale, discoloration, warping, scratches on base |
| Disposable air filter | 1–3 months | Visible gray discoloration, dusty appearance |
| Foam air filter (if applicable) | 6 months | Gray, compressed, difficult to clean |
Insurance and Medicare typically cover CPAP supply replacement on a similar schedule. If you're purchasing supplies out of pocket, prioritize the cushion — it has the highest impact on both hygiene and therapy effectiveness of any replaceable component. Browse CPAP masks, cushions, and replacement supplies in our catalog.
What Not to Use: The Cleaning Methods That Damage Your Equipment
Ozone / Activated Oxygen Cleaners (SoClean, VirtuCLEAN, Lumin, etc.)
This is the most important warning in this guide. Automated ozone CPAP cleaners are heavily marketed and genuinely ineffective at best, actively harmful at worst.
Ozone (O₃) is a powerful oxidizer that degrades silicone, rubber, and plastic compounds over time. ResMed, Philips Respironics, and Fisher & Paykel all explicitly state in their product documentation that using ozone cleaners voids the device warranty and is not a recommended cleaning method. The FDA issued a safety communication in 2020 noting that these devices are not legally marketed for CPAP cleaning and that ozone residue left in equipment could be inhaled by patients.
The Philips CPAP recall was partially accelerated by ozone cleaning — ozone exposure was specifically identified as a factor that degraded the PE-PUR foam in affected devices, increasing the rate of particulate release. For full context on that recall, read our article on the Philips Respironics CPAP recall.
Soap and water is the manufacturer-recommended cleaning method. Use it.
Bleach or Disinfectant Wipes
Bleach and alcohol-based disinfectants are too harsh for silicone cushions and degrade them rapidly. Disinfectant wipes (Lysol, Clorox) leave chemical residue that can be inhaled. Stick to mild, fragrance-free soap.
Hot Water
Water above approximately 50°C (122°F) can warp plastic components and degrade silicone. Always use warm, not hot, water for washing CPAP components.
Dishwasher
Most CPAP components are not dishwasher safe. The high heat, harsh detergents, and pressurized spray arms can warp, crack, or discolor components. Hand wash only.
Tap Water in the Humidifier
Not a cleaning agent, but worth repeating here: tap water contains dissolved minerals (calcium, magnesium, and others depending on your municipality) that deposit on the humidifier chamber's heated plate as white scale. This scale reduces heating efficiency, reduces humidification output, and creates surface irregularities that harbor bacteria. Use distilled water exclusively in the humidifier chamber.
Cleaning When You're Sick
If you have an active respiratory infection — cold, flu, sinus infection, COVID-19 — increase your cleaning frequency. Wash your mask and tubing daily rather than weekly during illness, and replace your filter immediately after recovering. If you have a bacterial or fungal respiratory infection, discuss with your physician whether temporary CPAP cessation or component replacement post-recovery is appropriate.
Travel Cleaning Routine
Maintaining your cleaning routine while traveling requires a bit of preparation:
- Pack a small bottle of fragrance-free dish soap in your CPAP travel bag
- Bring a small supply of distilled water or purchase it at your destination
- Use CPAP mask wipes for daily cushion cleaning when sink access is inconvenient
- Allow components to dry completely before packing — sealing damp equipment in a bag is worse than not cleaning at all
Frequently Asked Questions
Can I use baby wipes to clean my CPAP mask?
Most baby wipes contain fragrance, alcohol, or aloe — all of which can degrade silicone cushions and leave residue that irritates skin or airway. CPAP-specific mask wipes are formulated to be safe for silicone and leave no harmful residue. If wipes aren't available, a damp cloth with mild soap is the best alternative.
How do I get rid of the smell in my CPAP tubing?
Tubing odor is almost always biofilm — a thin layer of bacteria or mold on the inner surface. A thorough soak in soapy water followed by a rinse with a 1:1 white vinegar and water solution (then a final clean water rinse) typically resolves it. If odor persists after two cleaning cycles, replace the tubing — at $15–25 for most standard tubes, replacement is more effective than continuing to use a compromised component.
Do I need to clean my CPAP if I haven't used it in a few weeks?
Yes — potentially more thoroughly than usual. Stored equipment that wasn't fully dry before storage can develop mold or bacterial growth during the storage period. Before resuming use after a break, do a full weekly cleaning of all components and inspect for any visible growth, discoloration, or odor. Replace any components that show signs of degradation.
Is it safe to clean CPAP parts in the sink I use for dishes?
Yes. CPAP components cleaned with mild soap and rinsed thoroughly in a clean sink pose no cross-contamination risk to food preparation surfaces beyond what normal hygiene manages. Clean your sink before and after if you prefer, but there's no medical reason to use a dedicated CPAP-only sink.
My machine has a built-in cleaning mode. Does that replace manual cleaning?
No. Machine-based cleaning modes (where they exist) typically refer to internal air path maintenance — not the external patient-contact components. Your mask, tubing, cushion, and humidifier chamber require manual washing regardless of any onboard maintenance features. These are the components that actually contact your airway and accumulate biological contamination.
The Bottom Line
CPAP cleaning doesn't require expensive equipment, elaborate procedures, or significant time. Five minutes in the morning, fifteen minutes once a week, and consistent component replacement on schedule. That's the entire protocol. Soap and water, thoroughly rinsed, completely dried.
The patients who struggle with CPAP infections, persistent mask odor, or accelerated component failure almost always have one thing in common: an inconsistent cleaning routine. Build it into your morning as automatically as brushing your teeth, and it stops being a chore.
For full setup guidance on your AirSense 10 or 11, see our ResMed AirSense 10 setup guide. Experiencing mask issues despite cleaning? Our CPAP mask leak troubleshooting guide covers fit and seal optimization. Ready to replace worn components or upgrade your machine? Browse our full CPAP supply and machine catalog, or trade in your old device through our CPAP buyback program.
Written by Yashil Bhatt, RRT — Licensed Registered Respiratory Therapist with ICU and critical care experience and owner of My Respiratory Company.