Is it necessary to wash once a day? My hair doesn’t get greasy and I don’t seem to have any irritation. I wash once a week but it makes me wonder if it has something to do with why mh hair is still falling. I have been on finasteride for 7 years and minoxidil for 2 years and no stop of hair loss. Started early and finasteride slowed down my hair loss but it seems to have sped up since starting minoxidil