spiders in the keyboard

It was apparently cleaning day at work today.  T moved some desks and debris out of the office as it was a slow work flow day.  I got into the kick of it later as well and finally tackled my computer keyboard, which was covered in … whatever the stuff is that collects on keyboards and the bottoms of computer mice.  I tipped it up-side-down and gave it a few good whacks.  What came out was surprising – not just the volume of grot but something else – a spider!  I nudged it with my finger, and, sure enough, it was alive!  All this time I’ve been using a keyboard with spiders in it.