We are certainly discussing this topic, Ron. Can't say we will reach a consensus. I think we agree that a soft brush, or even a dense short brush like the ones that come with some cartridges, are fine for removing dust buildup. Some prefer the Onzow or similar goo/gel for getting off dust. What we do not seem to agree on is how to remove the baked on gunk, melted vinyl, or whatever it is.
Some have found that the Magic Eraser (ME) works great for this because it uses friction or abrasion to scrub off or sand off the crud. One must be careful with this method. Others think this is far too risky and prefer some kind of liquid, but the concern there is that it might migrate up the cantilever and dry out the rubber suspension.
I think there are two camps. I would experiment with both methods and see what works for you and decide with which you are more comfortable. Consensus is a difficult thing to achieve in this hobby.
Ron,
I would add to Peter's summary that we agree (I think) that it is important regularly to examine your cartridge - its stylus and cantilever primarily. I think we agree there is a positive relationship between clean records and clean styli - they promote each other. I hope that is small amount of agreement.
The 'discussion' about the Onzow cleaner has gone on for near 10 years, and obviously continues yet today. I think this in itself says that its acceptance continues to be mixed. I perceive two Onzow issues discussed in various threads, broadly speaking they are: a) safety or potential risk and b) effectiveness. The safety issue seems primarily oriented to carelessness / user error. I do not think there is much of a safety issue associated to the material itself interacting with the stylus/cantilever, but I'm not sure that issue is non-existent. I believe effectiveness remains an open issue.
Here's a thread from 2009:
https://forum.audiogon.com/discussio...onzow-zerodust
2012:
https://db.audioasylum.com/mhtml/m.h...i%2Fsearch.mpl
2015:
https://db.audioasylum.com/mhtml/m.h...i%2Fsearch.mpl
2018:
https://forum.audiogon.com/discussio...us-tip-cleaner
Just a quick sampling from two places easily searched - there are many many other threads on the topic..
As regards the Magic Eraser: it comes up as a method when the Onzow is discussed and sometimes as its own topic. Peter has rightly mentioned Doug Deacon's presentation of, and I suppose advocacy for, the ME which dates to 2004. I remember well reading the original discussion while it was on-going and I still think it is the best place to start, particularly Doug's opening post, to understand use of the Magic Eraser. You can find it on Audiogon here:
DIY stylus-cleaning magic long
I perceive primarily one Magic Eraser issue and that is: safety of its use / fear of its use. What does not seem to be an issue is its effectiveness. I perceive the safety/fear issue is largely conceptual - everyone seems to grasp the potential for harm through carelessness but I do not believe any (many?) claim that melamine foam is inherently harmful to styli, that is, it has no properties that will deleteriously interact with, or damage a stylus. However potential for harm is reflected in fear of use.
What is lacking in both instances is a sufficient aggregration of clear evidence that the safety issue is realized for either product. We do have anecdotal reports - which should not be denied out of hand - but that's about it. (Of course they're not anecdotal to those living with damage, if there is such.)
I will say I have not heard first hand accounts of anyone "ripping the stylus off the cantilever" with a Magic Eraser. In fact I've heard more "the maid broke my cartridge" stories than damage from either product.
We have come a ways from the days when a matchbook striker was the recommended cleaning tool.