Interesting information from Analog Planet on Stylus Cleaner Onzow Zero Dust.

@terry9 There are many folk here who have used Zerodust for years, do you seriously think that none of them would have noticed major build up of goop by now that someone would have heard a difference in SQ???

stop using mine years ago you could hear the sound degrading 

@daveyf 

Alas, we have no idea how many of them perceived something but did nothing about it. Perhaps they had no access to a good lab, Perhaps they put it down to stylus wear.

@terry9  or perhaps none of the above, and none of them heard any degradation at all. ..:0)