Jakers

my stock cd player, is giving me troubles. about half of the time the lettering on the screen is fading, so you can barely see what it says, and now my cd player is skipping, ive tried cleaning it many times, and it doesn't seem to skip when im not driving, but when im driving it does everyonce and while, but not nessacarily when it hits a bumb. has anyone had that problem? or know what it is, all i can think of is its a short somewhere in the wiring. but if i cant fix it, i was thinking about gettin a new cd player, and was wondering if anyones done that, since the cd players are smaller than the stock one, how they got it too fit? or if itd be better to get a bigger one with tape to fit in better