They do stink, don't they? My DD had one when she was pregnant with her second daughter. She cleaned the cage daily until she was put on bed rest about a week before she delivered. We went to clean her house before she brought the baby home and OMG did it stink. My DS cleaned the cage thoroughly and gave the hamster a bath. I think the poor hamster was happier and I know I was. I could finally take the clothespin off my nose. :-D
I must live a sheltered life because I'd never heard of zhu-zhu hamsters before Billy posted about them. ;-)