Haircare routine!!!

Does anybody know on how to deal with thin, straight hair without making it greasy? My hair gets so greasy after like 2 days can somebody help? My hair is nice and silky after hair wash day, but then after two days, it's literally so greasy, when I put it in a braid, its stays in the three sections.

Hair wash routine:

-Baby oil in roots, lengths and ends for 1-3 hours

-Rinse out oil

-Shampoo (Head & Shoulders Supreme) x2

-Conditioner (Pantene, I forgot what it said on the bottle but I know it's from that company) leave for ~5-10 min

-Keep in towel, then use Keratin oil and argan oil to protect it when I brush it

-Air-dry since blow-drying my hair with heat protectant makes my hair go more greasy