You need to apply hair oil on your scalp using your fingertips. Once you have applied the oil to your scalp, massage it in circular motions as it will help the oil to nourish your hair roots and provide the necessary nutrients.
Once you have applied the oil, you can either wash it off after an hour or you can cover it with a towel and shower cap and leave it overnight. The next day, wash it off with shampoo and condition as usual.