Ok, thanks for the suggestion. Even if (by some freak chance) something were to happen to the mouse/keyboard, it woud not wreck the rest of the PC, right?
Relax...nothing's gonna happen. Don't lose any sleep over it.
And no, it won't wreck the PC.
Keyboards are usually spill-proof these days - if a spill can't break it, a few slivers of metal definitely won't.
In the highly unlikely scenario that something does happen to your keyboard or mouse, just RMA them claiming that they were defective (I assume that since the machine's new, they are under warranty).
Alternatively, you could try opening up your keyboard and cleaning it as 'christop' suggested. Would probably void your warranty, though.