I saw this on another forum and I was surprised to see that it's all over the place. I usually shower every other day, and wash in the sink in between. My hair gets gross after 1.5 day though and I need to figure out how to stop it (I'm sure it was mentioned in the shampoo thread...). But my skin gets really dry. Kids get bathed every 3 days but we still wipe their butts 5 times a day or something ridiculous (they don't know how to wipe yet ) and I swear their hair never gets dirty. Obviously they get washed more if stinky.