The talcum powder can freshen your hair up a bit, you need to sprinkle it in the night before, just in the roots, so that if you put too much in and it won't brush out properly and you wind up with a head of white hair in the morning you still have time to wash your hair in the morning. It's something you'd need to experiment with to get it right. I find that when my hair is short to medium length it appears to get quite greasy, sometimes, people don't realise it but they have bad habits that makes their hair greasy quicker, my friend has a short hair and constantly pushes her hair off her face which makes her hair greasy quicker, do you have habits like that perhaps? They're often an unconscious thing.