Empty and rinse the tank weekly
The water tank is where bacteria and mineral buildup start. Every week, or more often if you live in a hard-water area, empty any remaining water from the tank and rinse it under running water. Use your hand or a soft cloth to wipe the inside surfaces — do not use a brush yet, as the tank material can scratch.
If you see white or tan crusty deposits (mineral scale), fill the tank halfway with equal parts white vinegar and distilled water, let it sit for 30 minutes, then scrub gently with a soft brush or cloth and rinse thoroughly. Rinse a second time with plain water to remove all vinegar smell.
Clean the base and water inlet weekly
The base of the humidifier — where the tank sits — collects mineral deposits and standing water. After emptying the tank, wipe the base with a damp cloth. Pay attention to the water inlet opening where the tank connects; mineral buildup here blocks water flow and reduces mist output.
If the inlet is clogged, dip a cotton swab in white vinegar and clean inside the opening. For stubborn deposits, soak a cotton swab in vinegar and hold it in place for a few minutes, then wipe. Do not force anything into the inlet, as you can damage the internal valve.
Key Takeaways
- Empty and rinse the water tank every week, or more often in hard-water areas, to prevent bacterial growth and mineral scale.
- White vinegar and distilled water in equal parts dissolves mineral deposits; soak for 30 minutes, then scrub gently and rinse twice.
- The base and water inlet collect the most mineral buildup and need weekly wiping with a damp cloth or vinegar-soaked cotton swab.
- The mist nozzle and ultrasonic disk require monthly cleaning with vinegar to maintain mist output and prevent mold.
- Use distilled water instead of tap water to cut mineral buildup by 80 to 90 percent and extend the time between deep cleans.
Soak the mist nozzle and cap monthly
The nozzle where mist comes out clogs with mineral scale and can grow mold inside. Once a month, unscrew the nozzle cap and soak both pieces in a cup of white vinegar for 30 minutes. Use a soft toothbrush or cloth to scrub away deposits, then rinse under running water and let air dry before reattaching.
If the nozzle opening is still blocked after soaking, use a straightened paperclip or a thin needle to gently clear the hole. Do not use force — if it does not come clear easily, soak for another 15 minutes and try again.
Clean the ultrasonic disk every month
The ultrasonic disk is the metal or ceramic piece inside the base that vibrates to create mist. Mineral scale on this disk reduces mist output and can cause the humidifier to stop working. To access it, remove the tank and look inside the base — you will see a small metal or white ceramic disk.
Dampen a soft cloth with white vinegar and gently wipe the disk surface. Do not scrub hard or use a brush, as the disk is delicate. If scale is thick, soak a cloth in vinegar and hold it against the disk for a minute, then wipe. Rinse the base with a damp cloth to remove vinegar residue, and let it dry completely before refilling the tank.
Replace the filter if your model has one
Some Levoit models include a filter cartridge that traps minerals and impurities. Check your manual to see if your unit has one — it usually sits in the base or inside the tank. If present, rinse it under running water every two weeks and replace it every one to three months, depending on water hardness in your area.
A clogged filter reduces mist output and forces the humidifier to work harder. If you notice mist weakening even after cleaning the nozzle and disk, the filter is likely the cause. Replacement filters are sold under the Levoit brand and cost between $15 and $25 for a pack of two or three.
Switch to distilled water to reduce cleaning frequency
Tap water contains minerals — calcium, magnesium, and others — that build up inside the humidifier and create the white dust you see on furniture. Distilled water has these minerals removed, so it produces far less scale and mold growth. Switching to distilled water cuts your cleaning time roughly in half and extends the life of the ultrasonic disk.
Distilled water costs $1 to $3 per gallon at any grocery store or pharmacy. For a humidifier that runs 8 to 12 hours a day, one gallon lasts about a week. The small cost is worth it if you live in a hard-water area or want to avoid weekly vinegar soaks.
Deep clean every three months
Beyond weekly and monthly tasks, do a full deep clean four times a year. Disassemble every removable part — tank, cap, nozzle, filter if present — and soak them all together in a large bowl or sink filled with equal parts white vinegar and distilled water for one hour. Scrub each piece with a soft brush, rinse thoroughly under running water, and air dry completely before reassembling.
While the parts soak, wipe down the base and interior with a vinegar-dampened cloth. Pay special attention to corners and crevices where mold can hide. Let everything dry in open air for at least two hours before you fill the tank and turn the humidifier back on.
Frequently Asked Questions
Can I use bleach to clean my Levoit humidifier?
No. Bleach can damage plastic parts and leave toxic residue that gets into the mist you breathe. White vinegar is safer and just as effective for mineral scale and mold. If you want a stronger disinfectant, use hydrogen peroxide at 3 percent strength, soak for 15 minutes, then rinse very thoroughly.
What is the white powder on my furniture?
That is mineral dust from tap water. The humidifier releases minerals along with the mist, and they settle on nearby surfaces as the water evaporates. Switching to distilled water stops this almost completely. If you keep using tap water, wipe furniture weekly with a damp cloth.
Why is my humidifier making less mist?
Mineral scale on the ultrasonic disk or a clogged nozzle are the most common causes. Clean the disk with a vinegar-soaked cloth and soak the nozzle in vinegar for 30 minutes. If mist does not return, the filter may be clogged — rinse or replace it. If you use tap water, switch to distilled water to prevent future buildup.
How often should I replace the water?
Empty and refill the tank every day, even if water remains. Standing water grows bacteria and mold within 24 hours. If you will not use the humidifier for more than a few days, empty it completely and let the base dry before storing.
Is vinegar safe to use around children and pets?
Yes, as long as you rinse thoroughly. Vinegar smell fades quickly and poses no risk once the humidifier is rinsed and dry. Never run the humidifier with vinegar inside — always rinse completely before refilling with water and turning it on.