I run into this issue a lot when I am low. I never have the energy after work to take a shower and in the morning it seems pointless with it being so cold. I have never had anyone say anything about it until recently when my new boss goes " your hair looks lighter did you dye it or something" and all I had done was shower >< even after that embarrassment I still have trouble. Reading through this thread I think that rewards may be the right way to go. My hair has gotten to the point where I have to braid it so it doesn't tangle so I've decided that I'm going to set a schedule where I shower every other afternoon and when I'm out of the shower I will put my hair up in curlers. See I always wanted curly hair but never had the guts to perm it so this will be a win:win. I get to have curly hair and I have a schedule that will help me keep up these hygiene practices.