How to Clean Your AirSense 11: Machine, Tubing and Water Chamber as Three Separate Jobs
Cleaning an AirSense 11 is three separate jobs on three separate schedules: the machine body gets a weekly wipe-down (never immersion, never the interior), the tubing gets emptied daily and washed weekly, and the HumidAir water chamber gets emptied and dried daily and washed weekly in warm water with mild soap or a 1-part-vinegar-to-9-parts-water soak — per ResMed’s own care instructions, never in water hotter than 131°F/55°C, never in a dishwasher (the standard Air11 tub), and never with moisturizing soaps, bleach, or alcohol. The filter is not cleaned at all — it’s disposable. The full part-by-part procedures, the banned-cleaners list, and the ozone-machine warning (FDA 2021) are below. Replacement chambers and filters are in the AirSense 11 supplies index →.
Quick Answer: Daily: empty the water chamber, wipe it dry, hang the tubing to air-dry. Weekly: wash the chamber in warm water + mild dish soap or a 1:9 white-vinegar soak (room temperature, max 131°F/55°C); rinse and dry out of sunlight. Machine body: wipe with a damp cloth weekly — never submerge, never clean inside. The disposable air filter never gets wet. No bleach, no alcohol, no moisturizing soaps, no ozone cleaners.
| Component | Daily | Weekly | Never |
|---|---|---|---|
| Water chamber (HumidAir tub) | Empty, wipe dry, refill before use | Warm water + mild soap, or 1:9 vinegar soak; rinse, air-dry out of sunlight | Dishwasher (standard tub), water >131°F/55°C, bleach, alcohol |
| Tubing (standard or ClimateLineAir) | Disconnect, drain, hang to dry | Wash inside-out with mild soap water; rinse well; hang | Bleach, alcohol; harsh detergents |
| Machine body | — | Damp cloth wipe; dry cloth after | Immersion, sprays into vents/interior |
| Air filter (disposable) | — | Check for discoloration; replace every 1–2 months | Washing (it’s disposable), water contact |
| Mask (cushion/frame/headgear) | Rinse cushion | Wash per mask instructions | Moisturizing soaps, antibacterial soaps |
The recurring debate on r/CPAP is a completely reasonable question: “I’ve washed my gear with Dawn for a year, is that bad?” The reconciliation is unglamorous: ResMed specifies a mild dishwashing liquid — plain (original) Dawn without moisturizers or antibacterial agents qualifies; the scented/lotion variants are what leave the residue people smell in their masks. The rule isn’t brand loyalty, it’s “plain soap, no additives.” That’s also the honest answer to “what does ResMed recommend to clean CPAP” — mild soap, warm water, vinegar for scale, nothing exotic.
Job One: The Water Chamber (The Part That Touches Water All Night)
Every morning: slide the chamber out, dump remaining water (never top it up across days — standing water in a warm chamber is how mineral scale and biofilm start), wipe with a clean towel, and leave it open to air-dry. Refill with distilled water before the next night — tap water’s minerals bake onto the heater plate as white scale that insulates the heater and eventually clouds the tub (the full story, including the descaling soak, is in the water chamber care guide →).
Weekly: wash in warm water with a drop of mild soap, or — the better descaling move — soak in 1 part white vinegar to 9 parts water at room temperature, then rinse thoroughly and dry away from direct sunlight. Caps: 131°F/55°C maximum water temperature. ResMed’s replacement guidance: around the 6-month mark, or sooner if the chamber is discolored, cloudy, cracked, or pitted — the official replacement tub (fits all AirSense 11 and AirCurve 11 machines) lists at $31 from ResMed’s own shop.
Job Two: The Tubing (Where Rainout Water Sits)
Daily: disconnect at both ends, drain any condensation, and hang over a shower rod or door — open ends down, air moving through. Weekly: run warm soapy water through the full length (hold one end under the tap, work it through), rinse with clean water until no soap remains, and hang to dry completely before the next night — a damp tube overnight is a standing-water problem of its own. Heated ClimateLineAir tubing has electrical contacts at the machine end: wash the tube as above but keep the connector end dry; never submerge the contact end.
Job Three: The Machine Body (Least Work, Most Misunderstood)
The AirSense 11 unit itself is a wipe-clean object: damp cloth on the exterior weekly, dry cloth after, paying attention to the air inlet area where the filter sits — with the filter cover removed, that’s where dust accumulates. Never: running water over it, spraying anything into vents, or opening the case. “Cleaning the inside” isn’t a user job — internal service is a warranty/repair matter. The black air filter inside the side cover is disposable: check it monthly (ResMed’s own checklist: discoloration, holes, tears), replace roughly every 1–2 months, never wash it. The official filter 2-pack runs about $9 (12-pack $29) — a few dollars a month is the entire filter budget.
The Banned List (And the Ozone Question)
ResMed’s care instructions exclude: bleach, alcohol, chlorine-based cleaners, moisturizing or antibacterial soaps, scented products, and dishwashers (for the standard Air11 tub). The reasons are concrete — alcohol and harsh chemicals degrade silicone mask cushions and tube plastics; moisturizers leave films you then breathe; dishwasher heat deforms tubs and seals.
The bigger exclusion is ozone and UV “CPAP cleaning machines”. In 2021 the FDA issued a safety communication about ozone-based CPAP cleaners (soiled-gas residue degrading materials, irritant exposure), and ResMed has consistently stated ozone cleaning is not compatible with its devices — the 2021 Philips recall context (degradation of sound-abatement foam) further reshaped the category. The competing content pages that still recommend SoClean-class machines as the convenient option are writing affiliate content, not care instructions. Soap, water, vinegar, and drying do the whole job for pennies.
Internal link: Cleaning and replacing are adjacent habits — the moment the weekly chamber wash reveals cloudiness or the monthly filter check shows gray discoloration, you’re holding the replacement trigger. The full replacement schedule with the adherence research → covers every part’s clock.
FAQ
What does ResMed recommend to clean CPAP?
Warm water plus a mild dishwashing liquid (no moisturizers/antibacterial agents), a 1:9 room-temperature white-vinegar solution for the water chamber, thorough rinsing, air-drying out of direct sunlight, and water no hotter than 131°F/55°C. For the machine: exterior wipe-down only. ResMed explicitly does not recommend ozone or UV cleaning machines.
Can I use Dawn dish soap to clean my CPAP?
Yes — plain original Dawn (no moisturizers, no antibacterial version, no scent additives) qualifies as the “mild dishwashing liquid” ResMed specifies. The variants to skip are anything labeled softening, lotion, antibacterial, or strongly scented: those leave residues in tubing and mask silicone. Rinse thoroughly either way.
Do I have to clean my CPAP tubing every day?
Empty and hang it daily (30 seconds), wash it weekly. Daily emptying prevents standing condensate; weekly washing with mild soap keeps the interior clean. Daily full washes are unnecessary by every manufacturer schedule — and tubing is itself a ~3-month replacement item anyway, so don’t deep-clean what’s past its service life.
What kills mold in a CPAP machine?
Prevention first: empty the chamber and tubing daily, dry both, use distilled water, and store the chamber open. For early growth (dark spots in the chamber or a musty smell): the 1:9 vinegar soak (20–30 minutes), thorough rinse, complete drying — and if the chamber is cloudy, cracked, or the growth returns, replace it (~$31 for the official Air11 tub). Visible mold inside tubing or the machine itself that persists through cleaning means replacing the tubing and contacting your equipment provider about the machine — that’s a service question, not a cleaning-intensity question.
Sources & References
- ResMed AirSense 11 User Guide & eshop.resmed.com product care instructions — daily/weekly chamber care, 1:9 vinegar ratio, 131°F/55°C limit, dishwasher exclusion. Official documentation (verified on official site 2026-08-21).
- ResMed “How to clean your CPAP equipment” (resmed.com) — cleaning matrix, agent exclusions. Official documentation.
- US FDA safety communication (2021) — ozone/UV CPAP cleaning devices risks. Official documentation.
- ResMed replacement parts & pricing — HumidAir Air11 tub $31 (SKU 39100); Standard Air Filters 2-pack $9 / 12-pack $29 (SKU 39301/39302). Official documentation (eshop verified).
- Reddit r/CPAP recurring soap/debate threads — Dawn usage patterns; referenced, not quoted. Community discussion.
- SERP top-10 cross-reference: resmed.com, cpapeuropa.com, reddit.com, cpapmyway.com (DataForSEO live SERP, US/2840, 2026-08-21). PAA questions: 4/4 incorporated.
Related Guides
Data page: Bacteria in water – why chambers biofilm
Keep reading: AirCurve 11 vs AirSense 11 vs AirMini Compared