Greasy hair

Erin • 21. Mama to a baby boy 💙
I wash my hair every morning (because if not it gets realllllly greasy) but even washing it everyday with $90 shampoo it gets greasy by the night time and it looks gross. does anyone know anything I can do that will stop this? 
sometimes I end up washing it in the morning for work and then again if I'm going out on the night which isn't good for my hair!!!