I have suffered with numerous mental health problems in the past but my hygiene has never been something I have struggled with personally (perhaps due to BDD obsessive grooming) 

However, I live with a girl who has poor mental health and autism. She doesn’t shower regularly at all and can’t brush her teeth properly due to sensory difficulties. She is also hypo sensitive to smell so probably can’t smell herself. You can smell if she has been in a room recently even if she’s not there and I worry this will affect her social life and job prospects - it likely already has. I also worry about her mental health if she is not able
to do these acts of self care. 

I have told her she should speak to someone because she can’t look after herself but she doesn’t seem to understand the severity. I just want to help her without hurting her does anyone who’s struggled with this kinda thing have any advice?