Unplug the humidifier and empty the water tank
Disassemble the unit (tank, base, wick/filter, cap, any removable parts)
Rinse all parts with clean water
If you have mineral buildup, fill the tank with equal parts white vinegar and water
Let the vinegar solution sit for 30–60 minutes
For heavy buildup, soak longer as needed
Scrub the tank and any removable parts with a soft brush or cloth
Rinse thoroughly with clean water until vinegar smell is gone
Clean the base using vinegar or a 1:1 vinegar-and-water solution (avoid soaking the motor/electronics)
Wipe the base with the solution and wipe dry
If the unit uses a filter or wick, remove it and follow the manufacturer’s instructions
If the filter/wick is reusable, rinse as directed; if disposable, replace it
For stubborn scale, repeat the vinegar soak and rinse again
Disinfect (optional but recommended): soak parts (not electronics) in a diluted bleach solution (1 teaspoon household bleach per 1 gallon of water) for 15–20 minutes
Rinse all disinfected parts very thoroughly with clean water
Dry all parts completely before reassembly
Refill with fresh water (use distilled if recommended by the manufacturer)
Reassemble the humidifier and plug it back in