My tenor sax has an airy sound when I play it. I just got it cleaned so I don't think air is leaking out. What should I do?

The air is possibly coming out via your embouchure. Check it in the mirror, and get yourself a teacher. The reed might also not be exactly in the correct place.

I've heard lots of air escaping from clarinettists sometimes, but it's not just a clarinet problem. It's easy to let yourself relax too much and the air escapes out the sides of your mouth.