I just went out to my car to retrieve my laptop. My car is at about 1 degree C, my house is at about 20 degrees C. I soon noticed condensation forming on the screen and it occured to me that condensation was probably forming inside as well on the electrical components. The combination of moisture, electricity, and dis-similar conductors seems like a perfect recipe for corrosion. I'm clearly not doing my laptop any favors by treating it this way, I'm just curious, how bad is this in reality? Do Electronics manufacturers take measures to mitigate this kind of damage? Is this sort of thing one of the primary causes of electronics failures? Given that any piece of computer equipment is going to be obsolete in 3 to 5 years anyway, is this something I should worry about? Or will obsolescence come before thermal cycle or corrosion damage anyway?