My family hardly ever used the AC at all througout much of my life and now that I'm living on my own and have a window AC unit in my room, I've been noticing dry throat for the past week. It's not quite a sore throat, but rather it's kinda like what you experience the day before a full blown sore throat. Everytime I wake up it's the worst, and then it's less noticeable throughout the day. At first I thought I was just due for a sore throat/cold, but it's been in this in between state for the past 7 days, and I'm guessing it's the AC now since my lungs aren't used to this cold dry air. Someone told me that the coolant stuff can irritate the lungs as well as the dryer air, and he said that's why a lot of people in Florida have lung problems (I don't know if that's true or not). Is this stuff true? Will my lungs get used to this, or am I putting my lungs at risk for permanent detrimental effects?