What is it with modern cars? Why does this happen so much? Both of our cars (2002 Saturn LW200 wagon & 2006 Toyota Prius) have these awful smells in the air conditioning system. When you turn it on for the first time in the spring, it puts out something that causes our eyes to water and smells like basement. I've noticed this in other people's cars and in rentals and it seems to be getting worse and worse. What do we need to get fixed and why can't automakers make this problem better? The dealerships just spray nasty chemicals down there so it masks the moldy scent but there has GOT to be a better way. Anyone???