I clean my pieces (built in downstem or stemless) using 2 methods.
1) Formula 420 soak n rinse. Cover ends with plastic wrap/rubber band and let sit. Comes out sparkling new. But this stuff isn't cheap. It's mostly limonene though.
2) Immerse entire piece if 95% ethanol and let sit there for 6 hours or so. It helps to place the piece in a sonicator (jeweler's ultra-sonic cleaner). You'd be laying the piece down horizontally and covering it with the everclear and then sonicating it until clean.
Both methods work, and I've always avoided the salt method myself. I 'lost' one piece for 4 years, rediscovered it.....dirty as hell and ended up looking new.
Tom