Chores causing problems. What should I do?

Ok I'm 22 and just moved in with a nice family of friends. They all have jobs and I don't so I do the majority of the chores every day. By midday I'm tired and just want to relax and hang out with them. I am a complete screw up. I always miss something that they think I should have caught like moping the floor or i miss dusting one shelf. For them its a big dill cause I did say I could do chores but they think I do chores to slow but when I do it fast like they do I miss event more things like forgetting to rinse or dry a few dishes. Witch I know is bad. It takes me half the day to get all the chores done properly then they get home and everything gets messed up. Then they expect me to re clean everything wile there sitting and watching tv or reading. How do I fix the situation and get better at my chores without hurting there fillings?