If your scalp is drier than a stand-up comedian’s throat after a bad set, try a lightweight oil. Argan oil and jojoba oil are great. Rub a few drops onto your fingertips and massage into your scalp before bed. It’s like giving your head a glass of water.
But don’t use olive oil from the kitchen. Your hair will smell like a salad for three days, and you’ll walk around craving croutons. Keep cooking oils for cooking.