What can i do to do clean out my lungs?

Stop smoking: Breathing deep, take deep cough, and clear phlegms. God bless!

Clean air: Your lungs will do a remarkable job of self cleaning if you expose them to a clean atmosphere. This may be difficult if you are a city dweller and of course you don't smoke (right?). The lung replaces its internal lining frequently and this helps get rid of things that do not belong there. So give it a chance and the lung will work with you.