How to Clean Your ResMed CPAP Machine

Understanding Your ResMed CPAP Machine Components

Before you begin cleaning your ResMed CPAP machine, it helps to understand what you're working with. A typical ResMed CPAP system has several key parts that require different cleaning approaches. The main unit is the machine itself—the device that sits on your nightstand or bedside table. This box contains the motor, humidifier chamber, and internal tubing that delivers pressurized air.

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The humidifier chamber is a removable water tank that attaches to the bottom or side of your machine. This component holds distilled water that gets heated and turned into moisture for your airway. Understanding this part is important because water left sitting in it can develop mold or bacteria if not cleaned regularly.

Your mask comes in several varieties depending on your prescription—nasal pillows, nasal masks, or full-face masks. Each mask has cushions or pillows that contact your face, headgear that holds it in place, and connection ports where the tubing attaches. The cushioning materials can degrade over time with daily contact with facial oils and sweat.

The tubing (also called the air hose) connects your machine to your mask and carries the pressurized air. Standard tubing is about 6 feet long and can accumulate condensation, dust, and debris inside over time. Some newer ResMed models include heated tubing, which requires special care since it contains heating wires.

The filters in your CPAP come in two types: an inlet filter that catches particles before air enters the machine, and sometimes an additional filter depending on your model. ResMed machines typically have a standard filter and may have an optional secondary filter.

Takeaway: Knowing which parts need which type of cleaning prevents damage to your machine. The humidifier chamber needs water-based cleaning, the mask needs gentle soap and water, the tubing needs flushing or wiping, and filters need either tapping or replacement depending on their type.

Daily and Weekly Cleaning Routines

Establishing a regular cleaning schedule keeps your ResMed CPAP functioning properly and reduces the risk of infections or equipment damage. Most manufacturers and sleep specialists recommend daily attention to at least one component and a deeper weekly cleaning.

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Each morning after use, disconnect your mask from the tubing and remove the headgear. Inspect the cushion or pillows for any visible debris, sweat buildup, or discoloration. Wipe the mask cushion gently with a soft, damp cloth or a cloth slightly dampened with warm water. This daily wipe removes facial oils, saliva, and dead skin cells that accumulate overnight. Don't use soap for this quick daily wipe—plain water is usually sufficient and less likely to leave residue.

Once daily, empty any condensation from your tubing. Even if your machine has a heated tube, some condensation may still form depending on your bedroom temperature and humidity. Hold the tubing vertically over a sink and let water drain out. This takes about 30 seconds but prevents water from sitting in the tube where bacteria and mold could grow.

One to three times per week, perform a deeper cleaning of your mask. Remove the cushion or pillow from the frame (if your mask model allows this) and wash both pieces in warm water with mild dish soap. Use a soft cloth or sponge to gently scrub away buildup. Rinse thoroughly under running water until no soap residue remains—soap left on the cushion can irritate your skin. Let the pieces air dry completely before reassembling.

Once weekly, also clean your humidifier chamber. Empty any water remaining in it and rinse it with warm water. Use a soft brush or bottle brush if available to reach inside the chamber. You can use white vinegar diluted with equal parts water if mineral deposits have built up inside (this is common in areas with hard water). Rinse thoroughly and let it air dry completely before refilling.

Takeaway: A quick daily routine of wiping your mask and emptying the tube takes less than five minutes but significantly reduces bacterial growth and equipment degradation. Adding weekly deep cleaning of the mask and humidifier chamber keeps your machine functioning well for months longer.

Monthly Deep Cleaning and Maintenance

Once a month, set aside 30 minutes for a more thorough cleaning that covers all removable components. This deeper maintenance prevents the buildup of minerals, mold, and bacteria that daily and weekly cleaning might miss.

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Start with your humidifier chamber. If you haven't already during weekly cleaning, soak it in a solution of equal parts white vinegar and distilled water for 15 to 20 minutes. This dissolves mineral deposits left behind by tap water or distilled water minerals. After soaking, use a soft brush to scrub the inside surfaces gently. Pay special attention to the heating plate at the bottom of the chamber, which is where mineral buildup concentrates most. Rinse thoroughly with distilled water (not tap water, which would just add more minerals) and air dry completely.

Inspect your inlet filter—the foam or mesh screen that prevents dust and particles from entering your machine. Hold it up to a light source. If it appears clogged with dust or discolored, tap it gently against the inside of a trash can to dislodge loose particles. If it looks very dirty or hasn't been replaced in several months, this is a good time to replace it. ResMed inlet filters cost between $10 and $20 and typically need replacement every one to three months depending on your environment.

Take apart your mask completely if possible according to your model's instructions. Most ResMed masks can have their cushions or pillows separated from the frame. Soak all soft parts in warm water with mild soap for 10 minutes, then scrub gently and rinse thoroughly. The hard plastic frame can be wiped with a damp cloth and dried. Check headgear straps for any damage or excessive stretching. Headgear typically lasts 3 to 6 months before the elastic begins to lose its grip.

For your tubing, once monthly you might want to do more than just empty condensation. Lay the entire length of tubing on a clean surface and inspect it inside for any visible mold, discoloration, or debris. If the interior looks dirty, you can flush it with distilled water by running water through one end and letting it drain from the other end into a sink. Never use soap inside the tubing. After flushing, hang the tubing vertically to ensure all water drains out, then lay it on a clean towel to air dry.

Takeaway: Monthly deep cleaning catches mineral buildup and potential mold growth before they become problems. Setting aside one afternoon monthly to thoroughly clean all removable parts keeps your CPAP machine in good working condition and extends its lifespan by several years.

Cleaning Products and What to Avoid

Choosing the right cleaning products protects your ResMed CPAP machine from damage while effectively removing buildup. Understanding what to use and what to avoid prevents costly repairs or replacing components prematurely.

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For most mask cleaning, warm tap water and mild dish soap (like regular Dawn or a store brand equivalent) work well. The key word is "mild"—concentrated or highly scented soaps can leave residue that irritates your skin or creates buildup on the cushion. Use just a small squirt of soap mixed with a bowl of warm water. When rinsing, run water over the parts until you see no more bubbles. Incomplete rinsing leaves soap film that can cause skin irritation or prevent proper mask sealing.

For mineral deposits in the humidifier chamber, white vinegar mixed with equal parts distilled water is effective and safe. The acidity in vinegar dissolves calcium and mineral buildup without damaging plastic components. Never use bleach, as it can damage plastic and leave toxic residue. Never use abrasive scrubbing pads, steel wool, or harsh scouring powders—these scratch plastic surfaces and can create cracks where bacteria hide.

Some commercial CPAP cleaning products are available, but they're not necessary for basic maintenance. Products like "CPAP Mask Wipes" can be convenient for quick cleanings but cost significantly more than plain water ($8 to $15 per package of wipes). If you choose to use them, they should supplement rather than replace regular soap and water cleaning, since they don't remove all buildup effectively. Be cautious of any cleaning products that