Quote from Monica in The One with the Dirty Girl
Monica: Hi. You don't know me. I'm Monica Geller, Ross's sister. Cheryl: Oh, yeah. It's too bad that didn't work out. Monica: Anyway, he told me about your apartment. And, well, I couldn't sleep thinking about it. So would it be okay if I cleaned it? [Cheryl slams the door] No? [Monica starts cleaning the door frame]