I own one if those excellent little Audio Technica electronic stylus cleaners, as I think, many of us do.  Here's the thing, though: I have used it a fair bit since buying it in about 1985 or 86, so it must have shifted a fair quantity of stuff by now.  Also, I have lived in some really dusty environments in the intervening years (not least, for 11 years across a farmyard from a busy grain dryer), .  Despite that, I have never, ever cleaned mine, other that to wipe off the odd big fluffy bit sitting on the surface of the fibre pad, so I was wondering who cleans their cleaner?
If you do, then, how often and how do you do it?