I typically use Paul Mitchell's Clarifying Shampoo and Conditioner...but, I'll be completely honest: I'm lazy, and Paul Mitchell is too expensive on Amazon (compared to in-store at Ulta). So, I decided to try this so I could have it shipped to me without driving 45 minutes to my nearest Ulta or salon. I absolutely love it! I do have very, very thick, frizzy, curly hair...but I've straightened my hair after using this several times and I have NO problem with any grease. In the shower, I wet my hair...use the Quidad clarifying shampoo....let it sit for the recommended 2 minutes...rinse...then I use my regular shampoo...and then my conditioner. That's my regimen. Love it! Will definitely buy again...certainly gets rid of all the build-up that develops after the gallons of hairspray I have to use to hold my hair when I wear it in an up-do!