What do you put on the botom of a cockatiels cage?

Originally, what I had was some pellets made for the bottom of cages. You are supposed to replace them every two weeks or so. But-this was costly, annoying, hard to manage, and SMELLY.

I had the brilliant idea of just putting newspaper on the bottom of his cage. It looks nicer, it's way easier to handle, it's easy to clean and take out, and-best of all-it DOESN'T SMELL!