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 most patients either overcomplicate or ignore entirely. Both extremes cause problems. Neglect it and you’re building a warm, moist environment that grows mold and bacteria directly in your airway delivery system. Overcomplicate it with expensive ozone cleaners and you may be damaging the equipment you paid hundreds of dollars for while voiding your warranty.
The truth: proper CPAP cleaning takes under 5 minutes per day and 15 minutes once a week. It requires nothing more than mild soap, warm water, and a clean towel. Written by Yashil Jugwanth, RRT — Licensed Registered Respiratory Therapist and owner of My Respiratory Company, serving Augusta GA, Evans GA, Aiken SC, Columbia SC, and nationwide. Here’s exactly how to do it.
Why Cleaning Matters Clinically
Your humidifier chamber sits at body temperature with standing water every night. Your mask cushion collects skin oils and moisture every session. Your tubing is a dark, warm, enclosed environment where condensation pools. Left uncleaned, these surfaces develop biofilm — structured communities of bacteria and fungi significantly harder to remove than surface contamination.
Clinical consequences of inadequate CPAP cleaning:
- Respiratory infections — bacterial or fungal, especially in immunocompromised patients
- Sinus infections and nasal irritation — from inhaling contaminated water vapor
- Accelerated component degradation — mineral deposits damage the humidifier heating plate; skin oils degrade silicone cushions
- Mask seal failure — oil buildup on cushions reduces silicone tackiness, actively causing leaks that tank your AHI data
What You Need
- Mild, fragrance-free liquid dish soap (Dawn Free & Clear or equivalent)
- Warm water (not hot — hot water warps plastic)
- A clean sink or basin
- A soft cloth or paper towels
- A clean towel or drying rack
- Distilled water for the humidifier
That’s it. No SoClean. No UV sanitizer. No ozone machine. More on why below.
Daily CPAP Cleaning Routine (5 Minutes)
Step 1: Empty and Rinse the Humidifier Chamber
Remove the HumidAir chamber from the left side of your ResMed AirSense 10 or AirSense 11. Open the lid, pour out all remaining water, rinse with warm water, swirl, and empty. Leave the lid open on a clean towel to air dry completely. Never leave standing water in the chamber between sessions — it is a primary source of bacterial and mold growth.
Step 2: Wipe the Mask Cushion
Using a damp cloth, gently wipe the inside surface of your mask cushion — the surface that contacts your face. This removes skin oils and moisture before they degrade the silicone. Air dry before storing. If your cushion is already stiff or discolored, it’s time to replace it. We carry replacement-compatible masks: the Nasal Pillow Mask Kit ($49.99), Nasal Mask Kit ($49.99), and Full Face Mask Kit ($39.99).
Step 3: Wipe the Machine Exterior
A quick wipe with a damp cloth keeps dust from the air intake. Takes 20 seconds.
Weekly CPAP Cleaning Routine (15 Minutes)
Step 1: Disassemble Everything
Disconnect tubing from machine and mask. Separate the mask into cushion, frame, and headgear. Remove the humidifier chamber.
Step 2: Wash the Humidifier Chamber
Fill with warm water and a small amount of mild fragrance-free soap. Swirl thoroughly, reaching all interior surfaces and the lid. Soak 5 minutes. Rinse thoroughly — soap residue left in the chamber gets aerosolized during therapy. Air dry completely, lid open.
Step 3: Wash the Tubing
Submerge in warm soapy water, run soapy water through the interior. Soak 5 minutes. Rinse by running clean water through several times until clear and odor-free. Hang to dry over a shower rod or towel rack. Allow to dry completely inside before next use — sealed damp tubing grows mold. If it’s time to replace, we carry standard CPAP tubing ($20) and heated tubing for AirSense 10 ($49.99).
Step 4: Wash the Mask Cushion and Frame
Wash in warm soapy water, using your fingers to clean all surfaces including where the cushion contacts your nose, mouth, and cheeks. Rinse thoroughly. Air dry completely before reassembling.
Step 5: Wash the Headgear
Hand-wash in mild soapy water or place in a lingerie bag on a gentle cold machine cycle. Air dry only — never use a dryer. High heat degrades elastic and reduces tension, directly affecting mask seal.
Step 6: Inspect and Replace the Air Filter
The ResMed AirSense 10 and 11 have a foam air filter at the rear. If it’s gray or visibly dusty, replace it. Clogged filters force the motor to work harder, increase noise, and reduce device lifespan. Replace every 1–3 months depending on your environment (more frequently if you have pets).
Component Replacement Schedule
| Component | Replace Every | Signs It Needs Replacing |
|---|---|---|
| Mask cushion / nasal pillows | 1–3 months | Stiffness, discoloration, persistent leak despite good fit |
| Headgear | 6 months | Stretched straps, worn velcro, poor tension |
| Mask frame | 6–12 months | Cracks, broken clips, warped plastic |
| Tubing (standard) | 3 months | Cracks, discoloration, persistent odor after cleaning |
| Heated tubing | 6 months | Same as above, plus wire kinking |
| Humidifier chamber | 6 months | Mineral scale, warping, scratches on base |
| Disposable air filter | 1–3 months | Visible gray discoloration |
What NOT to Use: The Methods That Damage Your Equipment
⚠️ Ozone / Activated Oxygen Cleaners (SoClean, VirtuCLEAN, Lumin)
This is the most important warning in this guide. Do not use ozone CPAP cleaners. ResMed, Philips Respironics, and Fisher & Paykel all explicitly state that ozone cleaners void device warranties and are not a recommended cleaning method. The FDA issued a 2020 safety communication noting these devices are not legally marketed for CPAP cleaning and that ozone residue left in equipment could be inhaled by patients.
Ozone exposure was also specifically identified as a factor that accelerated foam degradation in the Philips CPAP recall. Read our full Philips recall guide for context. Soap and water is the manufacturer-recommended method. Use it.
Bleach or Disinfectant Wipes
Too harsh for silicone cushions — degrades them rapidly and leaves chemical residue that can be inhaled. Avoid.
Hot Water
Water above ~50°C (122°F) can warp plastic components and degrade silicone. Use warm, not hot.
Dishwasher
High heat, harsh detergents, and pressurized spray arms can warp, crack, or discolor CPAP components. Hand wash only.
Tap Water in the Humidifier
Dissolved minerals in tap water deposit as white scale on the heating plate, reducing efficiency and creating surfaces that harbor bacteria. Use distilled water exclusively.
Cleaning During Illness
If you have an active respiratory infection, increase cleaning frequency: wash mask and tubing daily during illness, replace the filter immediately after recovering. If you have a bacterial or fungal respiratory infection, discuss with your physician whether component replacement post-recovery is appropriate.
Travel Cleaning Routine
- Pack a small bottle of fragrance-free dish soap in your CPAP bag
- Bring small distilled water bottles or purchase at your destination
- Allow all components to dry completely before packing — sealing damp equipment is worse than not cleaning
Frequently Asked Questions
How often should I clean my CPAP machine?
Daily: empty and rinse the humidifier chamber, wipe the mask cushion, wipe the machine exterior. Weekly: full wash of humidifier chamber, tubing, mask cushion, mask frame, and headgear in warm soapy water.
Can I use a SoClean or ozone cleaner on my CPAP?
No. All major CPAP manufacturers state ozone cleaners void device warranties. The FDA has flagged these as not legally marketed for CPAP cleaning. Soap and water is the correct method.
What water should I use in my CPAP humidifier?
Distilled water only. Tap water minerals deposit as scale on the heating plate, reducing efficiency and creating surfaces that harbor bacteria.
How do I get rid of CPAP tubing smell?
Soak in warm soapy water, rinse, then rinse again with 1:1 white vinegar and water, then a final clean water rinse. If odor persists after two cycles, replace the tubing. Our standard CPAP tubing is $20 — cheaper and more effective than continuing with a compromised component.
How often should I replace my CPAP mask cushion?
Every 1–3 months. Signs: stiffness, discoloration, or persistent leaks despite good fit. Skin oils degrade silicone and reduce sealing ability over time.
Do I need to clean my CPAP if I haven’t used it in weeks?
Yes — potentially more thoroughly than usual. Stored equipment that wasn’t fully dry before storage can develop mold during the storage period. Do a full weekly cleaning of all components and inspect for visible growth or odor before resuming use.