If sent up to get washed on their own they will: drench the bathroom (and I mean drench), spend hours in there, not actually wash themselves (just sit there/stand under shower) or pretend they've washed but have just changed straight into pjs. I also have a 15 year old who will literally spend an hour under a hot running shower morning AND night meaning the bathroom is running with condensation even with the window open and is unpleasant to use afterwards.
I have now started to insist that I am present in the bathroom and will wash hair and be generally Sargeant Majorish (I have started to time 15 yr old for 10 mins max). Tis a PITA as I already have a baby DC to bathe and put to bed and I would expect the older ones to see to themselves.
AIBU? DS's not happy and are saying they are too old for me to be in bathroom.