So I've been having this problem since I got my piece. The hair gets so oily sometimes, after about three or four days. I thought it was because I was styling it with wax, so I stopped using that, washed the piece, conditioned, both with sulfate free color safe stuff. I haven't used any styling products on it at all, and at first it's nice and clean and lustrous, then after a couple of days, weighed down and really oily. It's to the point where the plastic hair band I use to keep my hair back when I wash my face is totally greasy on the area where it touches my hair. Any ideas?