Looking for some advice again, hope you don't mind

. DD is sharing a flat with another five girls they had a flat inspection the other day and failed it. We were visiting for 12 days at the time and DD was staying with us, the room she shares with another girl passed but the rest of the flat failed. The state of the flat has really been getting DD down, she's no clean freak but it appears the others are a lazy bunch who can't be bothered to tidy up, if DD wants to eat she has to clean some dishes first. When we dropped DD back yesterday as we were going home I saw the flat yesterday and was surprised they didn't have ants or worse given the state of it. DD has been told that there is a further inspection within 72 hours and if the flat is not clean they'll all get fined and that a further inspection will be made with a larger fine or they'll be termed. These girls haven't attempted to clean up. They all go home in 9 days and the four messy ones have booked themselves into a hotel for the final night, I'm worried they'll go and leave DD with all their mess to tidy