People with thin hair and blondes are more likely to have oily hair because their scalps have more oil glands (followed by brunettes and redheads), according to The Doctors Book of Home Remedies. While the thickness and color of your hair may be out of your control, you can fight stringy, greasy hair with an apple cider vinegar rinse. Apple cider vinegar helps reestablish homeostasis in hair follicles and so works to correct dry and oily locks, says Roberts. Mix 1 tablespoon of apple cider vinegar to 1 cup of water, apply it to your hair and then rinse. You can also cut down on oils by rinsing hair with the juice of two lemons in a quart of water.