I've washed the rm4 1 time with soap, 2 times with washing up liquid, each time washing very thouroughly with a toothbrush and whatnot, and i've put it for 1 hour in an ultrasonic cleaner with washing up fluid. Of course each time i rinsed it with care. It still reeks machine oil, i don't know what to do next... Worst part is it seems ok until you fire the coil for a few secs and the flavor comes back. Might be the insulator, hard to determine. Same taste as machine oil though.
I bought a clone last month which had the exact same problem (Quasar, i'll have to look up the manufacturer to see if it's the same one.) i've tried other things with it, to no avail. I simply gave up after the 5th time.
I know the drill, i've had a number of RDAs and some were hard to clean but those two, i'm at loss...
Sent from Tapatalk, typos its fault.