Afterwards the unit can be turned down. Even on lower settings, it is not necessary to run the unit longer than 30-90 minutes at a time. Longer times may cause the oils to condense at the tip of the nebulizer glass which can allow them to drip down causing damage to the tubing, housing or other materials that the oil comes in contact with. If condensing does occur, wipe tip and length of glass clean with a dry cloth or paper towel. Keep essential oils away from diffuser housing and hoses.
Essential oils can degrade or damage the surfaces.
Only place essential oils into the wide orifice of the nebulizing bulb. Always re-cork after filling.