My thinking is that any residual surfactants in the grooves, upon contact with the clean water, should release them into said water?
They are soluble in water, but also bind to hydrophobic surfaces (such as vinyl and grease). When you rinse surfactants off surfaces, they bind to water, even when it's deep, in usually inaccessible places.
Yes, but in order to do that, the water should first get inside and make contact with it, shouldn't it? But before making contact, it can't get inside. That looks like a catch-22 to me.
Also, don't rinse with plain water. Use distilled.
Yes, distilled, of course. I wouldn't use any other kind.

By 'plain' I meant that you use only water, with nothing else added. Maybe 'plain' wasn't the right word.
If you have not read the document by Neil Antin, you really should. Now some of it is very technical, but you don't have to understand everything to do an excellent job of cleaning your vinyl records. You can do as much or as little as you want. Anything you do will be better than nothing.
Use the link below, then page down to download the pdf file.
Thank you. I have saved a copy of this document locally some time ago, and have read as much from it as I could, but I find that at times it gets much too technical about minutiae. I am a technically inclined person and am not a stranger to physics and chemistry, but even I find his deeply intricate scientific details and extremely frequent cross references a bit overwhelming.
All I need to know is the following:
- Do this. Don't do that.
- This thing works fine. That one doesn't.
- This machine is good. That one isn't.
- Period.
Almost two hundred pages of a scientific paper that even I, as an engineer (though not in physics/chemistry, but have studied them to some extent nonetheless), have trouble following, isn't much help.
A reader's digest version of that paper, in layman's terms, would be really welcome.
I did, however, notice one detail in that document that made me raise an eyebrow. Namely, that at 40 kHz the bubbles are approximately 75 microns in size, which means they are too big to get inside the grooves. And yet most commercial ultrasonic vinyl cleaning machines, with the notable exception of the Degritter, seem to use this frequency.
