Ultrasonic record cleaners

Who among us has first cleaned an LP in a conventional RCM, listened to it, and then cleaned the same LP again, in a good US machine, and then listened to it again?  I have done the experiment with a few LPs that seemed to resist conventional RCM cleaning, to no avail; the US machine was not a revelation.  Before investing thousands in a good US machine, it is best to understand the limitations of LP cleaning.  It cannot undo prior mistreatment or groove damage.

I’ve tried/bought a Kirmus ultrasonic cleaner and it worked well, heard blacker backgrounds on many LP’s, not all but thought it did a good job. Problem was it has so many steps involved in the cleaning process the machine just sat around and I never used it. Bought a Keith Monks RCM and have been extremely happy in it’s ability to clean LP’s, it’s quick and very quiet and only takes around 2-1/2 minutes per side. I use it almost daily without issue.

Just buy a cheap one and modify it for easier use.

I used a Nitty Gritty vacuum for years. Night and day difference with distilled water and a few drops of surfactant.

Just do batches of ~50. Fan dry while cleaning 9 @ time.

Cheep Ultrasonic cleaner from the net, does 6 LPs @ once.

 For used LPs, I just found a product called G3 by Groove master. No affiliation, just a happy consumer. Beats anything I've tried in the past 50 years. 

I used to own a VPI machine… the big one. It died a couple years ago and I bought a Nessie… a way better, quieter, more sophisticated machine that I think does a better job. I have many albums I bought from the 60’s and 70’s that cleaned up perfectly despite their incredible abuse. Then there is one in forty or fifty that is noisy… and cleaning just does nothing. Occasionally it is a new album. I think this is the observation the OP and a couple other folks here made as well.

I have not used an ultrasonic, but my Nessie is good and I suspect… but have no proof whatsoever that running these through an ultrasonic would not clean them up much better. I would love someone here to say I am wrong… and that x-brand will clean them up. I would definitely put that machine on my list to use in the case where my normal machine fails.