Humidifier emits an unpleasant or musty odor during operation.

Safety: Unplug the unit before cleaning. Avoid inhaling mold spores; consider wearing a mask.

• Discard old water: Empty the tank and base completely.
• Clean thoroughly: Wash the tank with mild detergent. Soak the base water tray in a vinegar solution to disinfect and remove slime. Rinse well.
• Replace filter: Install a new genuine Philips wick filter if the old one smells or shows mold.
• Use fresh water: Refill with clean tap or filtered water and change water daily during use.

Persistent odor after thorough cleaning may indicate hidden contamination; repeat cleaning or consult service if necessary.