If you’ve spent any time on CPAP forums or watched YouTube ads, you’ve probably been told that your CPAP machine is a breeding ground for deadly bacteria and that you need a $300 UV sanitiser or an ozone generator to stay safe. Let me save you some money: you don’t.

That said, you do need to clean your equipment. Just not the way the marketing departments want you to think.

What the Manufacturers Actually Recommend

Every major CPAP manufacturer — ResMed, Philips Respironics, Fisher & Paykel — publishes cleaning guidelines. They’re remarkably consistent and remarkably simple:

Daily: Wipe down your mask cushion with a CPAP-specific wipe or a damp cloth. Empty and rinse your humidifier chamber with clean water. That’s it.

Weekly: Wash your mask (cushion, frame, and headgear), tubing, and humidifier chamber in warm water with a mild, fragrance-free soap. Rinse thoroughly, let everything air dry out of direct sunlight.

Monthly/Quarterly: Inspect your mask cushion and headgear for wear. Replace filters according to your machine’s schedule (most have a reusable filter and a disposable one).

Notice what’s not on that list? Ozone. UV light. Specialised cleaning machines. There’s a reason for that.

The Ozone and UV Sanitiser Problem

Ozone-based CPAP cleaners became enormously popular a few years ago. They promised to kill 99.9% of bacteria without any scrubbing. Sounds great, except for a few problems.

The FDA issued warnings about ozone and UV CPAP cleaners, noting that none had been cleared by the agency for marketing as medical device accessories. The concerns aren’t trivial:

• Residual ozone can irritate airways, which is exactly what you don’t want when you’re breathing pressurised air through a mask all night
• Ozone degrades silicone and plastic components, potentially shortening the life of your mask and tubing
• UV sanitisers only work on surfaces directly exposed to the light — the insides of tubing and humidifier chambers have plenty of shadowed areas

Some users reported headaches, cough, and chest tightness after using ozone cleaners. For patients with asthma or reactive airways, this is a genuine risk.

Why Soap and Water Works

I know it feels too simple. We live in a world where everything needs a gadget and a subscription. But warm water and mild soap does an excellent job of removing the three things you’re actually trying to get rid of:

Facial oils and skin cells. These accumulate on your mask cushion and degrade the silicone seal. Oils are easily removed with soap and water. If your mask is leaking more than it used to, a good wash often fixes it.

Mineral deposits. If you use tap water in your humidifier (which most manufacturers say is fine, though distilled water reduces buildup), minerals will accumulate over time. A weekly wash with a diluted vinegar solution (one part white vinegar to three parts water) handles this. Rinse well afterwards.

Bacteria and mould. Yes, warm, moist environments can grow microorganisms. But regular washing prevents colonies from establishing. A study in the Journal of Clinical Sleep Medicine found that weekly cleaning with soap and water kept bacterial counts at clinically insignificant levels in the vast majority of CPAP setups.

A Realistic Cleaning Routine

Here’s what I recommend to patients, based on what people will actually do consistently:

Every morning: Pull your mask apart (cushion from frame), give the cushion a quick wipe or rinse. Empty the humidifier chamber and leave it open to dry. Takes about 60 seconds.

Every Sunday (or whatever day you’ll remember): Fill your bathroom sink with warm water and a squirt of dish soap (unscented if possible). Submerge your mask parts, tubing, and humidifier chamber. Let them soak for 15-20 minutes. Swish the tubing to get soapy water through the interior. Rinse everything thoroughly under running water. Hang the tubing over the shower rod to drip dry. Lay mask parts on a clean towel.

Every month: Check your mask cushion for cracks, discolouration, or loss of elasticity. If it’s degraded, replace it — a worn cushion causes leaks and skin irritation. Check your filters and replace disposable ones.

That’s genuinely all you need to do.

When to Be More Careful

There are situations where extra attention matters:

• If you’ve been sick. After a cold, flu, or respiratory infection, wash everything thoroughly and consider replacing disposable filters and the mask cushion. You don’t want to re-expose yourself to pathogens.
• If you notice a smell. A musty or sour odour from your tubing or chamber means something is growing. A vinegar soak followed by a thorough soap-and-water wash usually resolves it. If it doesn’t, replace the tubing.
• If you share a CPAP (don’t). Each user should have their own mask, tubing, and humidifier chamber at minimum.

The Bottom Line

Your CPAP equipment needs regular cleaning, but it doesn’t need to be expensive or complicated. Warm water, mild soap, and a consistent weekly routine will keep your equipment in good condition.

Save the $300 you’d spend on an ozone gadget and put it toward a good mask fitting instead. That’ll make a far bigger difference to your sleep quality. Sixty seconds in the morning, twenty minutes once a week. Your lungs will thank you.