What can you put in humidifier to eliminate smell?

To eliminate odors in a humidifier, you can add a few drops of essential oils such as lavender, eucalyptus, or tea tree oil to the water. Alternatively, a mixture of water and white vinegar can help neutralize smells. However, be cautious and check your humidifier's manufacturer guidelines, as some models may not be compatible with essential oils or vinegar. Regular cleaning of the humidifier is also essential to prevent mold and bacteria, which can cause unpleasant odors.