Empty and rinse the tank before each refill

The water tank is where bacteria and mineral buildup start, so cleaning it regularly keeps your humidifier working properly and the mist clean. Empty any remaining water from the previous use, then rinse the tank under running water. If you see white or chalky deposits inside—those are minerals from your tap water—fill the tank halfway with equal parts white vinegar and water, let it sit for 15 to 20 minutes, then scrub with a soft brush or cloth and rinse thoroughly until the vinegar smell is gone.

Do this before every refill, not just when you notice buildup. Hard water areas will accumulate minerals faster, sometimes within a week or two of regular use. If you live in a hard water area, consider using distilled water in your humidifier instead of tap water—it costs a little more but cuts mineral deposits by most of the way.

Key Takeaways

  • Rinse the water tank before each refill and soak it in equal parts white vinegar and water for 15 to 20 minutes if you see white mineral buildup.
  • The mist outlet and nozzle collect mineral deposits and need a soft brush or cloth to clear them—do not use sharp objects that can scratch the plastic.
  • The base and water inlet should be wiped down weekly with a damp cloth to prevent mold and bacteria growth in damp areas.
  • Use distilled water instead of tap water if you have hard water, which cuts mineral buildup significantly and extends the time between deep cleanings.
  • Never soak the motor base or electrical components, and do not use harsh chemicals or abrasive scrubbers that can damage Dyson's plastic and sensor parts.

Clean the mist outlet and nozzle weekly

The opening where mist comes out collects mineral deposits that can clog the spray or cause uneven misting. Once a week, use a soft cloth or soft-bristled brush to wipe around the mist outlet and nozzle. If deposits are stubborn, dampen the cloth with a 50/50 mix of white vinegar and water and let it sit on the clogged area for a few minutes, then gently brush or wipe away the buildup.

Do not use toothpicks, needles, or other sharp objects to poke into the nozzle opening—you can scratch the plastic or damage the internal spray mechanism. If the opening is severely clogged and soft brushing does not clear it, soak the removable nozzle cap (if your model has one) in vinegar and water for 20 minutes, then rinse and reattach.

Wipe down the base and water inlet monthly

The base of the humidifier and the area around the water inlet are prone to mold and bacteria because they stay damp. Once a month, unplug the unit and use a damp cloth to wipe the base, the inlet opening, and any grooves or seams where water can collect. Pay special attention to the rubber gasket or seal around the water inlet—this is a common spot for mold to grow.

If you see black or green spots (mold), dampen the cloth with white vinegar and wipe the affected area, then dry it thoroughly with a clean cloth. Do not pour vinegar directly into the base or soak any part of the motor housing—only use a damp cloth on the exterior surfaces.

Replace or clean the filter if your model has one

Some Dyson humidifier models include a filter cartridge that traps minerals and impurities. Check your user manual to see if your model has one and where it is located. If it does, rinse the filter under cool running water once a week, holding it so water flows from the clean side toward the dirty side—never squeeze or wring it, as that can damage the filter material.

If the filter becomes discolored or clogged after a few weeks of rinsing, it is time to replace it. Dyson sells replacement filters, and the part number is in your manual. A clogged filter reduces misting power and can harbor bacteria, so do not try to extend its life beyond its useful span.

Descale the entire unit every month with vinegar

Once a month, do a deeper clean to dissolve mineral buildup throughout the system. Fill the tank with equal parts white vinegar and distilled water, then run the humidifier for 5 to 10 minutes so the vinegar solution passes through the internal channels. Turn it off, let it sit for 30 minutes, then empty the tank and rinse it thoroughly under running water at least three times to remove all vinegar smell.

Refill with fresh distilled water and run the humidifier for another 5 minutes to flush out any remaining vinegar. This monthly descaling keeps mineral deposits from building up inside the spray mechanism and extends the life of the unit. In hard water areas, you may need to descale every two weeks instead.

What not to do when cleaning your Dyson humidifier

Never submerge the motor base, power cord, or any electrical component in water. Do not use bleach, hydrogen peroxide, or commercial descaling products—these can damage Dyson's plastic housing and sensors. Avoid abrasive scrubbers, scouring pads, or steel wool, which scratch the plastic and can create spots where bacteria hide.

Do not use tap water exclusively if you have hard water—the mineral buildup will eventually clog the nozzle beyond what regular cleaning can fix. Do not leave standing water in the tank between uses; always empty it after each session so mold does not grow in stagnant water. If you will not use the humidifier for more than a few days, empty and dry the tank completely before storing it.

Frequently Asked Questions

Can I use vinegar in the humidifier while it is running?

Yes, running a vinegar and water solution through the humidifier for 5 to 10 minutes is the best way to descale it. This lets the vinegar reach the internal spray mechanism and dissolve mineral buildup. After that, run fresh distilled water through it for another 5 minutes to rinse out the vinegar smell.

How often should I clean my Dyson humidifier?

Rinse the tank before every refill, wipe the mist outlet weekly, and do a full descale with vinegar once a month. If you have hard water, descale every two weeks instead. Empty the tank after each use so water does not sit and grow mold.

What should I do if the mist outlet is completely clogged?

Soak the nozzle cap in equal parts white vinegar and water for 20 to 30 minutes, then gently brush away the deposits with a soft brush. If it is still clogged after soaking, repeat the soak. Do not use sharp objects to poke into the opening, as you can damage the spray mechanism inside.

Is distilled water necessary, or can I use tap water?

Tap water works, but distilled water cuts mineral buildup significantly, especially in hard water areas. If you use tap water, you will need to clean and descale more often. Distilled water costs a little more but saves you time and extends the humidifier's life.

Can I use bleach to kill mold in the base?

No—bleach can damage Dyson's plastic and sensors. Use white vinegar and water instead. Dampen a cloth with equal parts vinegar and water, wipe the moldy area, and dry it thoroughly. Regular monthly cleaning and emptying the tank after each use will prevent mold from growing in the first place.