From Bob Rankin's newsletter:
... Until recently, I would have dismissed the notion that electronic gunk
can accumulate in a machine and cause it to act erratically. But a few
months ago my high-speed Internet connection, which is normally rock solid,
started getting flaky. I unplugged my cable modem, plugged it back in and
voila... things were back to normal.
And since then I've repeated the procedure a few times with good results,
whenever I noticed a slowdown in my Internet speed. ...
<http://www.askbobrankin.com/do_computers_get_tired.html>
Robert Turnbull, Toronto, Canada