Your scalp's pH balance is vital in preventing oil production. If the pH levels are out of whack, it's likely your hair will look and feel even oilier than it normally might be. But getting hair back to its natural balance doesn't have to be rocket science.
Corbett recommends doing an apple cider vinegar rinse. He says it "cuts oils and regulates the pH level of the hair and scalp." You can easily do it at home by making a mix of 1 part vinegar to 5 parts water. Put it in a spray bottle and spritz onto hair after towel drying. "Do not rinse out," adds Corbett. The smell of the vinegar will dissipate as it dries.
You can also try PHILIP B® pH Restorative Detangling Toning Mist. It's made with apple cider vinegar too, so it acts to rebalance the acid levels thrown off by tap water and leave hair shiny, smooth, and, most importantly, oil free.
PHILIP B® pH Restorative Detangling Toning Mist, $24 for 4.23 oz.