It's hard to tell what you mean by smoother, but I would venture a suggestion.
My own playing got a lot smoother with two things: steadier airstream and using the appropriate chromatic passing tones in my lines.
You can get these things by playing with records. I don't mean Aebersolds although they are great. I mean play along with your favorite recordings. Most of music is learned by oral tradition (or is it aural tradition). Listen and imitate. All the answers are there on records.
Best of luck!