Ultrasonic addiction, cannot stop.

I've had no problem with my Harbor Freight model. It's the smaller of the two they sell. I think it was $25? They put both of them on sale frequently.
I use a mix of vinegar and Simple Green, or whatever cleaner. I use it for small engine carbs that get gunked up with bad gas.
For what it's worth, I've heard you can literally boil carbs on the stove. Baking soda and water, I believe. I've used that in my ultrasonic cleaner, too.