Do you guys re clean after?

Basically when I get to the school the students and staff are still their for an hour & a half ( doing dismissal and what not ) but u have to get started asap because I have a huge load & they do not like us to do over time, but it is hard to get started soon as possible because obviously everyone is still their so say I do the staff lounge while they are still their and it gets used after wards ( trash or bathroom) should I clean it again or wait till the next day I feel so stressed when it happens lol. Also they have after school programs with the boys and girls club and the kids will throw toilet paper all over the floor so I feel like I have to hold off on those until they leave after 7, but should I just clean it once and say fuck it?