I always use a stick of hard wax but since I stopped bleaching my hair I think it looks too greasy.
I've let my hair go grey/white and it's the first time since I was 14 there isn't any dye or bleach in it, I didn't realise it seems to be naturally slightly greasy 
I shave the sides and the top is slightly longer but I cut into it to make it choppy. I'm also going through surgical menopause and it looks thinner.