I use a cheap generic ultrasonic tank (probably the same as the Vevor) and a
CleanerVinyl rotating thing. I got it a few years ago before they started upscaling their products, but mine is roughly the equivalent of the Easy 6. I can clean up to six albums at a time without problem. Anything that reliably turns vinyl slowly is a winner.
I typically use 6 drops of Tergikleen and pre-run and pre-heat the tank to ~30˚C. I rotate LPs at approximately one-quarter speed, something like one rotation every 30-ish seconds.
After cleaning, I rinse each LP through a
cheap SpinClean knockoff. I own a SpinClean and specifically use the cheap imitation because I do not want to clean the vinyl but rather rinse it. I let the vinyl air dry in a plastic dish rack for at least six hours, longer when possible.
I refuse to go down the magic ingredient path because the microscopic bubbles do most of the cleaning; surfectants and cleaning liquids make it work more effectively, that is all. If the first pass does not work, I run the vinyl through a second or third time. I use supermarket "distilled" water. I use quotes because it is probably ozonated rather than truly distilled. I do not care about fancy water, I just want it to be mostly mineral-free.
One extra thing: I use an old Brita tank with cheap (or used) filters to clean the used cleaning fluid. I store the cleaned fluid in plastic water jugs and note the date when used. I keep them in a dark, cool place. I have re-used solution three times with identical results.
A few years ago, I cleaned all of my vinyl. It took a few months, but it was worth it. There were a few LPs that were transformed from barely listenable to fully enjoyable without pops and extraneous noise. The Degritter had just come out and was (is still) ridiculously expensive, and I was nearly finished with my collection, so I stuck with the inexpensive setup. It is a bit more of a hassle than newer all-in-one solutions, but ultrasonic is definitely the way to go regardless. If I were shopping now, I would look at the HumminGuru very closely.
I now run new vinyl through the cleaner before playing. I recently got some Blue Note reissues and was gobsmacked at how dirty they were fresh out of the sleeve. I know most LPs are not very clean from new, but the amount of crap drained from the tank was surprising.
An example of the transormative power of microscopic bubbles: I have an old Prestige Moodsville LP (Number 6 with Red Garland Trio if you must know) that arrived with weird crap on it; I tried cleaning it multiple times with the SpinClean and it still sounded terrible. It got better after running through the ultrasonic setup, but it was still noisy. I think I ended up cleaning it at least ten times ultrasonically and it now is a very good-sounding LP. In fact, I just now put it on to make sure and it sounds beautiful.
The point is that most vinyl can be cleaned multiple times ultrasonically with little negative impact.