The best advice is to never store the keyboard in a location that's subject to temperture extremes. Sure, some folks get away with it for a while, but eventually, the elements catch up to you. For example, electronic components, specifically chips and ICs have certain operating limits, both upper and lower temperature ranges. Anything outside that range can be harmful to the components.

The second, and most obvious problem is condensation. Moving a keyboard, which has lots of parts that can condense moisture, from one extreme climate to another causes condensation on fragile parts. Just a week ago, when moving my 2000 from the van, where the temperature was nearly 85 degrees and humid, to a relatively cool, air-conditioned room, caused the screen's exterior to fog with moisture. The same thing happened to the laptop's LCD screen, both of which were wiped carefully with a soft, dry cloth. Keep in mind that same reaction takes place inside the keyboard and computer as well, but you just can't see it. Everything we use operates with extremely low voltages and currents, therefore, the slightest change in conductivity across the face of a printed circuit board is sufficient to trash the entire system. That's only one reason not to leave your equipment stored in the car--especially the trunk. The other reasons are obvious in this world of high crime. Sure, you might get away with it for a while, but the odds are not favorable.

Good Luck,

Gary