DEAR DR. ROACH: In a recent column, you noted that many patients do not properly use their inhaled asthma/chronic obstructive pulmonary disease (COPD) medications, but you didn’t tell us how to properly use them. I’d hate to think that I’ve been doing Advair and albuterol incorrectly all these years. A little help, please? -- Anon.ANSWER: The prope...