C-Span

I want to know why when I turn onto C-Span to watch the House of Representatives or the U.S. Senate that almost all the seats are empty. We elect politicians from each state to work hard to represent the interests of our state and they are almost never there. Why? It seems like the most consistent state showing up in the chamber is Ohio. I almost always see a senator or representative from Ohio. It looks like Ohio is active and trying to do their job. Where are the other guys and gals who have been elected to work hard to represent their state? There sure is a lot of work to do that needs to be done. Why aren't they there to debate issues?