Re: Greasy Flat Hair the Next Day
Pantene flat to volume or Paul Mitchell extra body shampoo, I find they both do the same for my hair. Just stay away from shampoo’s that have conditioners added or any super moisturizing shampoo and you’ll be fine. Also, make sure you’re using enough shampoo and you massage your scalp with it for a minute or two, an oily scalp needs extra cleaning.
Another trick you can do to have more volume is after washing your hair with a volumizing shampoo, brush it get all the tangles out, and then blow dry your hair upside down until it’s dry using a round brush. (This ofcourse is only when you’re going to be straightening your hair). When you put your head back up, it’s going to look like something exploded in your hair 
but brush it down and you’ll notice hair looks much more voluminous! 