Answer:
Your pours produce oil naturally and this leads to greasy or oily hair. Sweat and sebum make your hair greasy. To prevent this wash hair daily with shampoo formulated for greasy hair. Do not use a formula that will strip the hair, as this will cause your hair to start heavily producing natural oil, therfore making your hair oily. I would say give it two washes daily. I wouldn't recommend using conditioner, but if you need to, only put on a small bit at the roots. When you give your hair a final rinse in the shower, use cold or cool water which will close the pores. Aslo, never touch your hair, even with clean hands, and don't brush it too much.