Call me crazy, but if you use oil in the ultrasonic you don't have to worry about any of the water oriented problems. I actually just use mainly transmission fluid and a small amount of synthetic oil of any type. Plus very little Coleman lantern fuel.

I run the heater a few minutes, run the gun in it for a few more and toothbrush off the heavy stuff, run the gun in it a couple more minutes and wipe dry.

And guess what, it's all ready oiled and ready to go....