I have really oily/greasy hair.  If I skip washing it for one day, it looks greasy and gross.  I have tried to "train" my hair to go without washing every day over 5 months and it still looked greasy on the days I skipped washing.  Dry shampoos don't work for me - they end up smelling funny or just add to the buildup.  Does anyone have any recommendations for a better shampoo or an at-home remedy?