I have been trying to grow my hair out for about a year now so I didn't want to cut off too much. A trim, some shape, a little bit of layers. The problem with layers is that it can look flat often. for some shine I like that this argan serum works on both dry and wet hair. It smooths hair very well, and adds just a TON of shine and gloss without weighing it down. WHEN I HAVE got an oily streak, often just a lot of brushing will distribute the oil, or a quick spray of dry shampoo on that area.