How to get Syrian Hamster out of cage?

I've had him for a week & half now, & I need to clean the cage, but I can't because he won't come out and go into the ball. I tried putting food in my hands & waiting, and other things, but he still won't. How do i get him out, as i need to clean the cage soon. Also, why is he biting the bars instead of the chew toys inside?