4. Baking soda
One of the most effective and cheapest remedies for oily hair is baking soda. Mix 1 liter of clear water with 2 tablespoons of baking soda, apply to the hair and leave for about 20 minutes. Rinse well with lukewarm water.
You can also use baking soda as dry shampoo. Just sprinkle a bit of it on your roots and then brush it out.