How to Clean Your CPAP Machine: A Step-by-Step Guide
Last updated August 2026
Quick answer: how to clean a CPAP the right way
Every morning, wash the mask cushion and empty the humidifier, refilling only with distilled water. Once a week, hand-wash the mask, tubing, and humidifier tub in warm water with a little mild dish soap, rinse thoroughly, and air-dry out of direct sunlight. Check filters weekly and replace disposables monthly. Skip harsh chemicals, dishwashers, and ozone or UV “cleaners” that manufacturers do not endorse. Warm, humid CPAP equipment is a perfect home for bacteria and mold, so consistent cleaning protects your lungs and makes the gear last.
Why CPAP cleaning matters
A CPAP works by pushing a continuous stream of warm, often humidified air through a tube and mask into your airway. That warmth and moisture, plus the oils, skin cells, and moisture from your own breath and face, create an ideal environment for bacteria, mold, and fungus to grow inside the mask, tubing, and water chamber.
Neglected equipment can lead to:
- Respiratory infections, sinus irritation, and a persistent cough, as you breathe air that has passed over microbial growth.
- Skin irritation and breakouts where the mask meets your face.
- Foul odors in the mask and hose.
- Faster wear on cushions and seals, which harden and leak when caked with oils.
- Voided warranties, since many manufacturers require reasonable maintenance.
Good news: a proper routine takes only a couple of minutes a day and is entirely low-tech.
What you need
You do not need special products. Gather:
- Warm water
- A mild, fragrance-free liquid dish soap (avoid antibacterial, moisturizing, or strongly scented soaps that leave residue you would then breathe)
- A clean sink or basin
- A soft cloth and a tube brush
- A towel or drying rack, set away from direct sunlight
- Distilled water for the humidifier (tap water leaves mineral scale and can carry impurities)
Always unplug the machine before cleaning any component.
Daily cleaning routine
Do this each morning when you take the mask off, so parts have all day to dry.
- Wipe down the mask cushion. Use a damp cloth or a fragrance-free CPAP wipe to remove overnight facial oils and sweat from the cushion and the parts touching your skin. This is the single most important daily step for a good seal and clear skin.
- Empty the humidifier chamber. Pour out any leftover water. Never let water sit all day, as standing water breeds bacteria and mineral deposits.
- Rinse and air-dry the chamber. Give it a quick rinse with warm water and set it out to dry.
- Refill only at bedtime, and only with distilled water, up to the fill line.
- Leave the tube to breathe. Hang the hose or drape it so any internal moisture can evaporate during the day.
Weekly deep clean
Once a week, give the full airflow path a proper wash.
- Disassemble the mask into its parts (cushion, frame, headgear), detach the tubing from both ends, and remove the humidifier chamber.
- Wash the mask and cushion in warm water with a few drops of mild soap. Gently rub the cushion; do not scrub hard, as it can tear or deform.
- Clean the tubing by filling it with warm soapy water, running a soft tube brush through, then flushing it clean. A long hose is easiest to clean by submerging it in a basin of soapy water and swishing.
- Wash the humidifier chamber with warm soapy water. For mineral buildup, soak with a solution of one part white vinegar to a few parts water for 20 to 30 minutes, then rinse very thoroughly.
- Rinse everything twice in clean water. Soap residue is irritating to breathe.
- Air-dry completely before reassembling. Hang the tubing vertically (over a shower rod or a hook) so water drains out, and keep all parts out of direct sunlight, which degrades plastic and silicone.
The headgear and straps do not need weekly washing but should be hand-washed every couple of weeks to remove oils, then air-dried flat.
Filters, and how often to replace parts
Filters are easy to forget and important. Most machines have a foam or paper particulate filter, and some add a finer disposable filter.
- Reusable foam filters: rinse in warm water weekly, squeeze out, and air-dry. Replace roughly every six months or when discolored.
- Disposable paper or fine filters: do not wash them; replace about once a month, or sooner in a dusty home or if you have pets.
Replacement is not optional maintenance, it is part of the therapy. As a general schedule (follow your manufacturer and supplier guidance, and your insurance replacement allowances):
| Part | Typical replacement interval |
|---|---|
| Mask cushions or pillows | Every 1 to 3 months |
| Full mask | Every 3 to 6 months |
| Tubing | Every 3 to 6 months |
| Humidifier chamber | Every 6 months (sooner if cloudy or scaled) |
| Disposable filters | Monthly |
| Reusable filters | Every 6 months |
| Headgear | Every 6 months |
Cushions and headgear that lose their shape cause leaks, which reduce how well your therapy works, so replace them on time even if they look okay.
What to avoid
A few common mistakes do more harm than good:
- Ozone and UV “CPAP cleaners.” Major manufacturers and the FDA have cautioned that these devices are not proven safe or effective and may leave residual ozone. Soap and water remains the recommended method.
- Dishwashers and washing machines, which can warp plastic parts and are not appropriate for tubing or masks.
- Harsh chemicals such as bleach, alcohol, or scented and antibacterial soaps, all of which can degrade materials or leave residues you breathe.
- Tap or bottled water in the humidifier, which leaves scale and can introduce minerals and microbes. Use distilled only.
- Drying in direct sun or with heat, which cracks silicone and plastic over time.
Cleaning tips for real life
- Keep a spare set of supplies so you always have clean, dry gear ready.
- Wash at a time you will remember, such as a set morning each week.
- If you have a cold or infection, wash your mask and tubing more often to avoid reinfecting yourself.
- Not sure which machine or mask fits your face and needs? See our CPAP buying guide and the CPAP and BiPAP machines hub, plus mask options like the nasal mask and full face mask.
FAQ
Can I use regular tap water in my humidifier? It is not recommended. Tap water leaves mineral scale that shortens the chamber’s life and can carry impurities. Distilled water keeps the chamber clean and your air pure, so it is worth the small cost.
Do I really need to clean it every single day? The quick daily steps, wiping the cushion and emptying and rinsing the humidifier, take under two minutes and prevent most odor and buildup. The thorough wash is weekly. Skipping the daily reset is where problems start.
Are ozone and UV CPAP cleaning machines safe? Regulators and manufacturers have warned that these are not proven safe or effective and may leave harmful residue. Stick with warm water and mild soap, which is the method device makers actually endorse.
How do I know when to replace parts instead of just cleaning them? Replace cushions and masks when the silicone hardens, discolors, tears, or stops sealing, and tubing when it cracks or will not come clean. Even without visible damage, follow the interval table above, since worn parts leak and reduce therapy effectiveness.
Bottom line
CPAP cleaning is simple, cheap, and non-negotiable for safe therapy. Wipe the cushion and reset the humidifier daily, do a full soap-and-water wash of mask, tubing, and chamber weekly, keep filters fresh, and replace parts on schedule. Use distilled water, skip the ozone gadgets and harsh chemicals, and let everything air-dry out of the sun. A few minutes a day protects your lungs, your skin, and your investment. If you are still setting up your therapy, start with our CPAP buying guide.