Dirty...

Ok, I have maid, that's a luxury in some aspects. But I can't understand how you can be so unaware of dirt? Ok, she's short; she can't see everything I can see. But anyway? We organised the guest room a few days ago and that made me realise the thick layer of dirt on the top of the bookshelf. She can't ever have cleaned there. This plus the Beijing air makes it like this. Wiping it off makes the paper black! My father took a tour with a wet cloth in the apartment when they stayed here. He did all the door rails and light switches. The cloth, yes - black...