Hair vinegar is good for oily hair.

Out of all the products I've tried, Yves Rocher Hair Vinegar was the best. It's convenient to just dab it on my hair after shampooing, brush my teeth, and rinse it off. Even if I skip washing for two days, my hair doesn't get greasy and feels squeaky clean. I don't use it every day because I'm worried it might be irritating, so I use it about three times a week. The only downside is that the cap makes it a bit inconvenient to apply to my hair. It would have been much easier if it had a pointed cap.