More on the Onzow Zerodust

It looks like WallyTools, which has no financial interest one way or another, is doing more controlled experiments with the product.  Until it is completed, I think it would be best to stop using the suspect product.

I have not used gel cleaners myself.  I do know of two instances where someone accidentally pulled the cantilever out of their cartridge using such cleaners.  I suspect that they lifted the cartridge up too fast, and the force exceeded the limits of the design of the suspension (after all, the suspension is designed to resist forces from the stylus dropping onto a record, but not in the other direction).  Both cartridges were quite delicate MC designs (one was an Allaerte, the other I cannot recall), so I don't know if this should be a concern for everyone, but, I do suggest a very slow and gentle lift from the gel using the cuing lever.    

I doubt that there would be much in the way of ferrous debris that would be attracted by a magnet, nor would that explain why such debris would deposit on the stylus and cantilever which are NOT ferrous.  Nor would this explain why the condition is particular to use of gel-type stylus cleaner and not with other cleaners.  This appears to be some kind of chemical deposit, and one that probably changes in property when exposed to the temperature and pressure of the stylus tracking the groove (it gets burned on in the process).  

I have been practicing what is recommended by Wally Tools independent of their recommendation--mostly dry brushing to remove gross deposits, with very occasional wet cleaning with a stylus cleaner like LAST.  This has worked for me.  I don't see much crap building up on the stylus.