1. Turn the unit off;
2. Remove the top section;
3. Remove the oil cup from the unit;
4. Drizzle 2 to 3 drops of oil onto the sponge provided. Place the sponge in the oil cup;
5. Place the oil cup back in the unit;
6. Replace the upper part and turn on the device.

Be sure to use only aromatic oils suitable for use in air purifiers.