Empty and disassemble the humidifier before cleaning

Turn off your Levoit humidifier and unplug it from the wall. Wait at least 30 minutes for the unit to cool completely. Empty any remaining water from the tank by unscrewing the cap at the top and pouring the water out into a sink. Do not pour water down the drain if it has been sitting in the tank for more than a few days — that water may contain mineral deposits or mold spores.

Once the tank is empty, separate the parts. Most Levoit models have a tank that twists off from the base unit. Remove the tank, then locate the filter cartridge inside the base. The cartridge is usually a small foam or paper insert that sits in the water chamber. Gently pull it straight up and out. Set all parts on a clean, dry surface where you can work.

Key Takeaways

  • Clean your Levoit humidifier every three to seven days to prevent mineral buildup and mold growth inside the tank and base.
  • The tank and base require different cleaning methods — the tank uses vinegar or mild soap, while the base needs a soft brush or cloth to avoid damaging internal parts.
  • Replace the filter cartridge every 30 days during regular use, or sooner if you see visible discoloration or mold spots.
  • Hard water creates white mineral deposits that can clog the mist nozzle; soak the nozzle in vinegar for 15 to 20 minutes to dissolve buildup.

Clean the water tank with vinegar or mild soap

Fill the tank halfway with warm water and add either two tablespoons of white vinegar or a few drops of unscented dish soap. Screw the cap back on and shake the tank vigorously for one to two minutes. This loosens mineral deposits and any slimy buildup on the inside walls. Pour out the solution and rinse the tank thoroughly under running water at least three times to remove all vinegar or soap residue.

If you see stubborn white or brown stains inside the tank, fill it again with equal parts white vinegar and warm water and let it soak for 30 minutes. Then scrub the inside gently with a soft bottle brush or cloth — do not use a hard-bristled brush, which can scratch the plastic. Rinse again until the water runs clear and the tank smells like water, not vinegar.

Wipe down the base unit and mist nozzle

The base unit houses the motor and heating element, so it needs a gentler touch than the tank. Dampen a soft cloth with plain water or a 50-50 mix of white vinegar and water. Wipe the outside casing and the top surface where the tank connects. Use a dry cloth to wipe away any moisture when ready afterward — do not let water pool on the base.

The mist nozzle is where mineral deposits accumulate most visibly. If you see white crusty buildup, soak a small cloth or cotton ball in white vinegar and hold it against the nozzle opening for 15 to 20 minutes. Then use a soft toothbrush or small brush to gently scrub away the loosened deposits. If the nozzle has a removable cap or cover, unscrew it and soak that piece in vinegar as well. Rinse everything under running water and let it air dry before reassembling.

Replace or rinse the filter cartridge

The filter cartridge traps minerals and impurities from the water. If it looks discolored, has visible mold spots, or has been in use for 30 days, replace it with a new one. Levoit sells replacement cartridges that fit your specific model — check the model number on the bottom of your humidifier and order the matching cartridge.

If the cartridge is less than 30 days old and looks mostly clean, you can rinse it under cool running water to extend its life. Hold it gently under the faucet and let water run through it — do not squeeze or wring it out, as that can damage the foam or paper material. Let it air dry completely on a clean cloth before putting it back in the humidifier. Never soak the cartridge in vinegar or soap, as these can break down the filter material.

Reassemble and refill with fresh water

Once all parts are clean and completely dry, reassemble the humidifier. Insert the filter cartridge back into the base unit, pushing it straight down until it sits flat. Screw the water tank back onto the base, turning it clockwise until it is snug — do not over-tighten, or you may crack the plastic threads.

Fill the tank with fresh, cool water. If you have hard water (water that leaves white deposits on faucets or shower heads), consider using distilled water instead — it contains fewer minerals and will reduce buildup inside the humidifier. Screw the cap back on, place the tank on the base, and plug the unit back in. Run it for a few minutes to make sure water flows normally through the nozzle before leaving it unattended.

How often to clean based on water type and use

If you use your Levoit humidifier daily in a room with hard water, clean it every three days. If you have soft water or use the humidifier only a few hours per day, cleaning once a week is usually enough. The best way to know when to clean is to look inside the tank — if you see white, brown, or pink discoloration, or if the water smells stale, it is time to clean.

Empty the tank and refill it with fresh water every time you use the humidifier, even if you are not doing a full cleaning. Stagnant water in the tank breeds mold and bacteria within 24 to 48 hours. If you will not use the humidifier for more than a week, empty it completely, clean all parts, and let them dry before storing it in a cool, dry place.

Frequently Asked Questions

Can I use bleach to clean my Levoit humidifier?

No. Bleach can damage the plastic tank and leave toxic residue that enters the air when the humidifier runs. Stick to white vinegar or mild dish soap. Vinegar is strong enough to kill mold and dissolve mineral deposits without harming the humidifier or your health.

What is the pink or brown slime growing inside my tank?

That is mold or bacteria. It grows in stagnant water and is harmless in small amounts, but it can cause respiratory irritation if you breathe it in. Empty the tank when ready, clean it with vinegar, and refill with fresh water. Empty and refill the tank daily going forward to prevent regrowth.

Why is my humidifier making a gurgling sound after I cleaned it?

Air bubbles are trapped in the water chamber or nozzle. Unplug the unit, tip it gently side to side a few times to release the bubbles, and let it sit upright for five minutes. Plug it back in and run it for a minute. The sound should stop once the air escapes.

Do I need to clean the humidifier if I use distilled water?

Yes, but less often. Distilled water has no minerals, so you will not see white buildup. However, mold and bacteria can still grow in stagnant water. Empty and refill the tank every one to two days, and do a full cleaning with vinegar once every two weeks.

Can I put the tank in the dishwasher?

Check your Levoit manual first — some models have dishwasher-safe tanks, but most do not. Heat and harsh detergent can warp the plastic or damage the threads where the tank screws onto the base. Hand washing with warm water and vinegar is safer and takes only a few minutes.