Empty your humidifier daily and refill with fresh water.
Use undiluted white vinegar to remove scale (mineral buildup). Then, if desired, use a solution of 1 teaspoon bleach to 1 gallon of water to disinfect your humidifier.
At the end of the season, or if not using, descale and disinfect your humidifier (as outlined in ‘Weekly’) before storing. Never store humidifier with a used filter or other accessories.