The Klaudio US cleaner uses plain distilled water and that has worked fine for me. I haven't had to use the vacuum machine since getting the Klaudio, and will probably end up selling it.
I'm impressed with you guys that experiment with various cleaning fluid formulations, but it just sounds like
too much
bother to me. I really like the one-button, one-step convenience of the Klaudio. And because it's more convenient, I'm more likely to use it. That means more clean records.