I still follow the recipe and method in Rushton's article. It's pretty comprehensive and has served me well. Easy to implement once you source the ingredients.
Here's the link https://positive-feedback.com/audio-discourse/rushton-paul-diy-approach-ultrasonic-cleaning-lps/
Cheers,
Spencer
Here's the link https://positive-feedback.com/audio-discourse/rushton-paul-diy-approach-ultrasonic-cleaning-lps/
Cheers,
Spencer