WHAT IS WRONG, TECHNOLOGY

I think I need to get a new stereo for my car. It's one of those units that plays both regular audio CDs and burned mp3 discs, but lately it's been behaving ... oddly. What it boils down to is, I can't play mp3 discs

- First thing in the morning
- Anytime after the sun has gone down, basically

I wonder if it has something to do with cold or condensation or something? The thing is, when I'm starting my car up from a dead stop after being left alone all day at work, mp3 functionality is fine, but then again it's also been in the hot sun all day. Starting it first thing in the morning after a long sunless night is a whole 'nother story. Audio CDs always work, but mp3s? Never right away. I have to "warm up" the stereo with at least the first two or three tracks of an audio CD first. When I'm starting the car at night, same thing. Sometimes mp3s are OK, but I have to put up with hideous bubbling and skips for the first 10 minutes or so.

People, what's going on. Is my stereo getting senile. That's it, isn't it. I didn't know machines could do that.