Question: how to apply onion juice on hair wikihow?
Answer: Use a comb to part your hair down the middle then spray your scalp 5 or 6 times or until it's damp. No need to brush your hair, just use your fingers to massage the onion oil onto your scalp. If your scalp is extremely dry, apply the onion juice first and then massage in 2 teaspoons (9.9 mL) of coconut or olive oil.