@Laurel124, great advice from @Lisa723 @Colleen253 @Sarah977 I would also let it slide this time, because they could leave a retaliatory review if you say anything, which could damage your numbers and hurt future bookings. If you had 50 or so reviews, then I would say something and actually would charge them for an extra day.
As Sarah said, I would certainly send a message the night before with your checkout procedures, including what you expect of them as far as cleaning up with dishes, etc and also reminding them of the checkout time and that it's important to observe it so your cleaning staff has time to prepare the space for the next group of guests.
I would ding them on the 'following rules' section with a 3 probably and mention it in the narrative as well.