That's the direction I'm looking to try next... I actually reached out to Groovewasher when I was first doing my review videos and just so happens they had a HumminGuru they were testing with at the same time....
They shared their results with me (no affiliation with Groovewasher, but they are an extremely friendly and upfront company)..
Here is what THEY were first seeing in their HG with Distilled Water ONLY:
After Distilled only Auto Clean:
View attachment 121383
And here is WITH One-drop G-Sonic added to HG bath (Auto Clean):
View attachment 121384
Again, sharing this here ONLY as I didn't get permission to share, but all-in-all the G-Sonic sounds like a great approach.
Ben