To use rice water for hair, follow these steps:

1. Prepare rice water by rinsing 1/2 to 1 cup of rice, then soaking it in 2-3 cups of water for around 30 minutes to overnight. Strain to collect the liquid.
2. After shampooing and conditioning hair as usual, pour or spray the rice water over hair and scalp.
3. Gently massage the rice water into the scalp and hair.
4. Leave it on for 5 to 20 minutes (or up to an hour for deeper treatment).
5. Rinse thoroughly with lukewarm water.
6. Use once or twice a week to avoid protein overload that can make hair brittle.

Rice water is known to strengthen hair, improve elasticity, soften hair, add shine, and may reduce dandruff. Results vary depending on hair type and consistency of use. Follow with a conditioner or hair mask to maintain moisture balance.