“I notice my hair gets oily faster when it’s straight. But when I use a curling iron to curl my hair, it seems to takes longer for the oil to set in.” — Sarah C.

Here’s why it works: The wavier your hair texture is, the drier it tends to be, says hairstylist Stephanie Pohl. The waves and bends in your hair make it harder for the oil to spread. When your hair is straight, there’s nothing to stop your natural oil from slipping down the hair shaft. Time to break out that curling iron.