This isn't a mystery.
Give me a little credit-- I’m neither a rookie nor an idiot.
If the definition of insanity is doing the same thing and expecting
a different result, what is it when you do everything the same,
expect the same result, and get a different one? I’d say a mystery.
If you found a thick viscous black goo an inch deep in your tumbler
for no evident reason, every week or so, and a thin slick at other
times, but most of the time no problem at all, you’d probably be
We clean things in the ultrasonic before they go in the tumbler, if
they need it.
I appreciate the suggestions. Oddly, for the moment, the problem has
dissipated on its own. Go figure.