You can apply hair oil to damp or dry hair, but Bellemare recommends using it on dry strands. “Hair oil is best applied to dry hair because oil and water don’t mix. On wet hair, it can’t ...

If using it with a carrier oil: Mix one or two drops with a carrier oil, and apply it to the scalp. Leave it on as a scalp mask for 10 to 15 minutes, or even as an overnight treatment.