I'm well aware that I have oily skin. I just never really wanted to deal with it much during my teenage years, oddly enough, and now I try everything to keep my face shine free. So I turned to oil-blotting sheets.

this was purchased by me.
I've been using these to help control my shininess for a few years and I picked up these e.l.f. ones because they're cheep and basically everywhere (you know, easily accessible to most).