Use one can of Coconut Milk, two teaspoons of olive oil, three tablespoons of juice from a lime, and start with one tablespoon of cornstarch (add more as needed).
The mixture did not permanently straighten hair nor but it helps hair straighten better and it seems to help fight against humidity.
Apply to hair and let it sit for a few hours. Rinse with water and a little shampoo and then rinse with conditioner. Let hair air dry and then style as usual.