Exercise has worked the best for me also. I am supposed to go on the TOBI, but it's so expensive, and my insurance at work will only cover 80%. I already spend $300 on Zithro, which is great. TOBI is starting to scare me a little. I take the Tobra, and mix it with a Sublutamol inhaler solution, made for nebulizers, and it cuts the coughing while taking it, and reduces the inflamation in the lungs, allowing the meds to do their job. I recommend talking to your doctor about that, if you find that it's making you weez. That's how it started with me!Cheers allAlison W/CF Cornwall, Ontario