Wanting to put more cleaner than I needed.
Steve, I went through the same thing initially. However, I was overlooking the fundamental purpose of the Tergitol. It’s not the Tergitol doing the cleaning, it’s the microscopic imploding bubbles that do the cleaning. The surfactant, in this case Tergitol, is there to reduce the surface tension of the “water-air” interface on the surface of the record. Reducing the surface tension allows the bubbles more and better access into the grooves of the record, the whole object of the exercise.
The trick has been to find just the right amount of surfactant to get a good cleaning but not generate suds or leave too much residue behind after drying.
Definitely a work in progress.
daniel