you cant till they are 2 weeks old
Yes, it is highly advised to do this regularly. Twice a week would be best.
Like any hamsters cage?
you should clean it once a week
It is very important that you do not touch the baby hamsters because then the mother will smell human on them, and she will eat the babies. What you need to do is transfer the babies with a plastic spoon or something to another location. The mother will eat her babies. So you want to keep them separate. After the babies are removed, clean the cage as usual.
Every 1 week clean his or her cage.
none really...
Yes.
it might not be safe to take them out of the cage cause of the risks of infection
yes you can clean out anything
No hamsters arent messy pets but you have to clean their cage once a week cuz it stinks
yes..
most should my hamster had a baby and all of them lived