Recently, I have been attempting to extract essential oil from Damask rose petals (Rosa damascena). However, due to the small scale of my apparatus (1000 ml flask and 5000 ml), the amount of oil extracted is very low. While the layer of extracted oil is visible, it sticks to the walls of the apparatus when I try to remove the aromatic water. I have read many articles, but the only solution mentioned is to remove the oil and dry it under anhydrous sodium sulfate.