I use the Neil Antin Manual Cleaning Method, combined with a few tweaks offered up by individuals that are using the same methodology. It suits me just fine for a few reasons.
I like the personal input to showing a care for Vinyl that has been owned for 40ish years and less.
It represents a method used on past manual cleaning attempts, but the new method is offering an end product that is unrecognisable to older used methods.
I now have a method in place that enables six LP's to be cleaned in not much more than a 30-minute session.
I don't refer to Cleaned LPs as the end product, I refer to them as Purified LPs, resulting from the impression made during a replay.
The solutions that Neil advises on to be produced, are in my mind able to dissolve deep in the groove and lift out residual / particle that has once been in contact with a styli.
I have a USM that can mount Six LP's, it remains boxed and unused, even though I did consider for a Brief Period to use it as a device for a rinse cycle during the manual cleaning methodology, the end result of the manual cleaning does make this seem unnecessary.
The Solutions that Neil suggests being mixed, might help produce a much-improved outcome on your RCM available for use. The Manual Clean Method can also be carried out as a Comparison.
Neils has a solution mixture also for a USM, so if this method is selected, very useful Tank Fill Solution will already be at hand.