How do you keep your hair from getting greasy over night?

To prevent your hair from getting greasy overnight, consider using a silk or satin pillowcase, as they reduce friction and help maintain your hair's natural oils. Additionally, avoid applying heavy products before bed, and try to wash your hair regularly based on your hair type. You can also use dry shampoo on your roots before sleeping to absorb excess oil. Lastly, keeping your hair tied up in a loose braid or bun can help minimize oil transfer to your pillowcase.