INFORMATION ARTICLE
Cleaning Humidifiers: Tips for Hygienic Humidifier Maintenance
London, England - March 18, 2026
Air humidifiers can help improve indoor air quality, but many people forget that humidifiers need to be cleaned regularly to ensure they remain hygienic and effective. Poorly maintained humidifiers can grow bacteria and mould, which circulate in the air you inhale. In this article, read about why it’s so important to clean your humidifier, how often to do it and what you’ll need.
Why do I need to clean a humidifier?
A humidifier evaporates water and everything else that’s in its water tank. If you don’t clean the tank regularly, bacteria and mould can develop, be dispersed into the air and be inhaled. This can cause allergic reactions, irritated airways or even respiratory infections.
If you don’t clean your humidifier regularly, the filters can also become clogged, making the device less effective and potentially shortening its lifespan.
How often should I clean a humidifier?
It’s recommended to empty your humidifier and rinse the tank every three days. You should also thoroughly clean the machine at least once a week using a mild cleaning agent. If you live in an area with hard water or use your humidifier regularly, you might need to clean it more often.
What do I need to clean a humidifier?
You can clean a humidifier with these common household tools and products:
White distilled vinegar (cleaning vinegar).
Clean, warm water.
A soft brush or toothbrush.
A clean cloth (preferably microfibre).
Cotton swabs.
A mild disinfectant (optional – make sure it doesn’t contain bleach).
Step-by-step: How to clean your humidifier
Follow these steps to clean your humidifier:
Turn off the machine and unplug it.
Empty the tank and rinse it with water to remove dirt and dust.
Fill the tank with a 1:1 mixture of water and vinegar and let it sit for at least 30 minutes to remove limescale and bacteria.
Use a soft brush to clean corners, and don’t forget to clean the lid.
Rinse everything thoroughly with clean water.
Let all parts dry completely before reassembling the device.
Common cleaning mistakes
Here are some common mistakes people make when cleaning air humidifiers:
Waiting too long before cleaning the humidifier.
Using harsh cleaning agents.
Not rinsing the humidifier properly after cleaning with vinegar or soap.
Storing or reassembling the humidifier before all parts are fully dry.
Failing to check and replace the filter regularly.
Tips for hygienic humidifier use
In addition to regular cleaning, here are more tips to keep your humidifier hygienic for longer:
Use filtered water to reduce limescale.
Empty the device if you won’t be using it for a while.
Store the humidifier in a dry, well-ventilated area.
Check the manual for information on which parts need maintenance.
Replace parts on time to keep your humidifier at its optimal performance.
How does Dyson make cleaning your humidifier easier?
Cleaning your humidifier regularly is a key part of maintaining its hygiene. The Dyson Purifier Humidify+ Cool™ PH04 Formaldehyde Purifying humidifying fan is an air purifier, humidifier and fan in one innovative design. It helps clean, humidify and ventilate the whole room, keeping you cool in warm weather. Plus, with smart design, simple disassembly and automatic notifications, cleaning your Dyson humidifier has never been easier.
Smartly designed water tanks that are easy to open and remove for quick and easy filter changes, with automatic reminders on the machine and in the MyDyson™ app.
A 360 Combi Glass HEPA + Carbon 2-in-1 filter that notifies you when it needs replacing on the machine and in the MyDyson™ app.
Simple disassembly so you can clean parts thoroughly and easily.
A one-gallon tank that gives you 36 hours of hygienic humidification without regular refilling.
FAQs about cleaning humidifiers
An air purifier filters harmful particles like dust, pollen, smoke and bacteria from the air to improve indoor air quality and reduce allergies or asthma. Air purifiers don’t add moisture – they only clean the air.
It’s not required, but it can help prevent limescale and extend the life of your device.
You can use cleaning vinegar to remove a buildup of limescale and bacteria. Just make sure to rinse the humidifier thoroughly afterwards to avoid skin or eye irritation during use.
The frequency with which you replace the filters depends on the humidifier and brand. Generally, we recommend replacing them every 1-3 months, but always check the manual for the manufacturer’s advice.
Ultrasonic models often require more maintenance as they have small misting plates where dirt can accumulate. Clean these machines carefully using a cotton swab.
Don’t use bleach to clean your humidifier, as it can leave harmful residues or damage parts. Instead, use white vinegar or a mild disinfectant.
Maintain your humidifier for fresher air
A humidifier is a useful device for keeping your indoor climate comfortable and healthy, but you need to clean it regularly to avoid spreading bacteria or mould. No matter what kind of humidifier you have, a clean tank and regular maintenance can help ensure you enjoy fresh, healthy air for years to come.
