How often should I clean the water tub in my humidifier?

Recommended to wash on a daily basis.

On a daily basis, we recommend that you wash your water tub in warm water, using a mild detergent. Rinse thoroughly with clean water, and let dry away from direct sunlight.

On a monthly basis, we recommend that you inspect the water tub for wear and deterioration. Replace the water tub if any component has cracked, become cloudy or pitted. Clean any white powder or deposits in the water tub by using a solution of one part household vinegar to ten parts water.