Thanks a lot for all your responses. I will certainly get a humidifier this weekend to see if it works for me. You know ever since I came across this website, I have been addicted to it. The first thing I do every morning when I arrive school is to switch on the computer and visit this website. Each time there is some new insight.Although I do not find anyone else from Hong Kong registered here, I am not at all lonely and it seems that I have made a lot of friends from various parts of the world. Brian has really done a very splendid job.