ultrasound record cleaning machine damaged my records

@pindac Thank you for posting a link to Neil Antin‘s magnum opus.
@antinn Thank you for responding to clarify specific questions with citations to your book.

Generally speaking, this is a very very confusing topic for beginners such as myself, getting back into vinyl in a serious fashion. I found the organization of Precision Aqueous Cleaning of Vinyl Records, 3rd Edition quite well laid out, easy to read, and well illustrated. What’s more, it cites materials for not only the United States, but Europe, the United Kingdom, as well as Australia. In five chapters it describes the process recommended as a starting-off point, with the what’s and why’s of each step. It’s strongest point, I think, is that it doesn’t hold up one ingredient or the other as a silver bullet, or mandate specific ‘hard rules’ so much as (1) describe the task, (2) list materials, (3) describe precisely how and why procedure is given the way it is, (4) offers ways to check effectiveness. Finally, it is very well documented. Anyone seeking to clean their records would benefit from reading it, in my opinion. It was worth the morning I spent doing so.

Note: Chapter 6 discusses keeping your records clean, and Chapters 7 through 15 delve deeper into the component parts of the cleaning process, starting with the water, and finish examining the method and effectiveness of record cleaning machines, both vacuum and ultrasonic. Appendix B consists of a helpful List of Abbreviations and Acronyms (don’t you wish everyone did).

For my part, I washed my old records by hand with warm water and Fels Naptha Soap and dried them with a cotton towel. [Hey! The process was aqueous, wasn’t it?] Play improved on all but the worst ones. I’ve purchased a Spin Clean, but have yet to use it. I’m thinking I’ll print out chapters 1-6 and start building my kit before I start in on my collection of about 200 LPs and 750 45 RPM records.

@pfmaudio I hope you are able to get some satisfaction from the dealer, and hopefully recover whatever was lost on your recordings. I can certainly understand your reticence to make any more sacrifices for ‘science’ or other’s satisfaction. 

@oldrooney I have built a kit around the Manual Cleaning Method described using UK Sourced Substances to be used as a mixture to produce the cleaning solutions.

I also bought into a 2.5Litre Pressurised Gardner Spray Bottle, with adjustable nozzle from jet to fine mist. This is excellent for wetting and Power Rinsing.

For the Mixtures produced to be Cleaning Solutions, I bought from Amazon multi Pack Spray Bottles approx' 0.5 Litre with adjustable nozzle from Mist to jet. 

I have a Batch of Baby Scalp Brushes, colour coded to prevent cross contamination, each Brush has it own shallow rinse bowl.

I have Super Absorbent Sponge for First Dry and the Micro Cloth for the final dry.

New Sleeves are a must once cleaning is complete.

When I get fired up to clean, I protect an area with News Paper to catch the over spray.

Clean over the News Paper, but keep the Albums off the News Paper.

I can do 10 Albums in an Hour and the first 2 or 3 Albums are dry enough to play when the cleaning session is over and evidence of it having happened are cleaned up.

After the first Album is Played, if played immediately, all Albums can follow being played if wanted.

@oldrooney,

Thank you for the compliment but let us not forget the contribution of @whart who generously stepped in as Editor and Publisher making the book available for free via his site -  Precision Aqueous Cleaning of Vinyl Records-3rd Edition - The Vinyl Press and arranging that any time the book is downloaded, it's always the latest version.  

And let me reiterate the premise of the book as stated in the Forward - 

All cleaning procedures specified herein are presented as only “a” way to clean a record. No claim is made there is only one way to approach the process. In the final analysis, the best cleaning process is the one that is best for you.

Good luck,

Neil

PS/For those in the UK & EU, Chapter II Table II EU/UK Manual Record Cleaning Process Material Substitution List, the Tonar™ Plasticgoat Natural Goat Hair Wet Record Cleaning Brush may not be suitable.  The design the book links - Tonar Plastigoat Natural Goats Hair Wet Record Cleaning Brush - SCOTT NANGLE AUDIO (snvinyl.co.uk) may not be the design being sold - Tonar Plastigoat Brush - HIFI MEDIA which has very short brushes and one user in Switzerland recently reported unsatisfactory (and may leave residue).  The preferred Stasis brush (same as the Record Doctor brush) is available in the EU - Stasis Plattenbürste - Rockers Records.

After this long thread I went to my dealer to discuss the matter. We listened to all the records on his system. And to the surprise of all, there was no problem with the records when played at his system. The problem must be at my turntable, as that is the only variable that wasn’t checked before. 
It is a little misterious becaus, in my system, ONLY THE CLEANED RECORDS caused problems. I hear no difference in other records and the system seems ok to me. I will now check all the TT set-up because the problem must lie there. 
The TT and cartridge of the dealer was of a similar quality of mine (SME 20.12 with Lyra Atla Carteige). His turntable a little better and the cartridge a little below the Atlas. 
I will keep everyone informed on further developments. 
Ome of the reasons why I didn’t at first reveal the brand of the machine was this one. I have more than 30 years on this hobby and it is not the first time that the reason of a problem is the one we think. 
To all HuminGuro owners and future owners I say to be assured that my records weren’t, apparently, damaged by the US cleaner. 
Thanks everyone for the help and comments, specially @antinn for the great help. 
I will keep you informed. 

If it was only the cleaned records sounding off, one can only explain this by wondering if they were not completely dry, or even whether psychacoustic factors came into play somehow? (I mean no disrespect with the latter, we are all susceptible.)

Surely it cannot be a TT set-up issue or that would affect all records, cleaned or not.