About a week ago I started mysteriously smelling smoke periodically throughout the day, and at night when I m in be trying to fall asleep. This isn t a constant smell just occasionally. I haven t smoked in over three years now, no one smokes in my office and we have never smoked inside our home. I have a new car that has never been smoked in either. It s very strange. There is nothing on fire any where, and it is not coming from the furnace or car heater. I heard somewhere that suddenly starting to smell strange things might be indicative of a problem. I know this sounds really weird, but I m a bit concerned. Can you give me any advice?