u/AsleepCrazy

I’ve recently moved into a new apartment, and I absolutely know nothing about paint/proper ways to clean. I’ve been getting scruffs/black marks on the walls and have been avoiding attempting to clean them because I have no idea how to clean them. My concern is that it’ll ruin the paint or leave a stain, I’ve tried looking online but I see mixed reviews about the safest way to clean them. I believe they are flat painted walls? Plz help!