It has always been difficult getting DD to do any chores around the house, and now she is 18, she won't do anything at all. She is still at school, having messed up the first year of 6th form, but is now doing really well with her school work. No exams coming up. She has a part time job, usually Saturday only, but sometimes both days at the weekend, and has 2 days during the week with no lessons at all.
Her bedroom is a complete tip, but I never ask her to do anything with it other than bring plates down (which she does after I've been asking for several weeks). I also don't ask her to do any chores relating to the house in general. Perhaps once a month, I ask her to empty the dishwasher on a day when she's at home and I'm at work, which she does.
She doesn't cook, except for herself for lunch on a day off occasionally, when she then leaves all the dishes for someone else to clean up. My main problem is that she also leaves the bathroom in a tip, clothing and towels on the floor, makeup round the sink and blobs on the floor, blobs of shampoo etc round the shower. So the only things I actually ask her to do are to leave the bathroom tidy and clean enough for the next person, and to clean it properly if she has let it get in a real state. She either says she will do it but never does, or she says it doesn't affect me because DH and I have an ensuite. Her younger brother uses the bathroom though, and I need to be able to get to the laundry bin, and to clean in there generally.
How do I actually get her to realise and accept that she should be cleaning up after herself, and get her to do it? Or do I just give up and clean it all up myself whenever she leaves a mess (not inclined to do this really, but I can't see any way of getting her to pull her finger out)? We all have jobs, so she's not the only one out at work/school. Nothing I say or do seems to have any effect at all.
Can anyone suggest anything that might work, before my head explodes?