When it comes to applying hair oil, the debate between whether you should put it on wet or dry hair is a long-standing one. Ultimately, the answer depends on what type of oil you are using and your individual hair needs. For lighter oils such as argan oil or coconut oil, adding them to damp or towel dried hair before styling will help to seal in moisture and protect from damage. If you’re looking for heavier oils like castor oil which can be used for scalp stimulation and thicker tresses then applying this after shampooing and conditioning but when your hair is still quite wet will provide maximum hydration benefits. The key takeaway here is that each person’s individual needs may differ so experiment with both methods until you find what works best for you!