Ultrasonic cleaning is faster, more thorough and safer than most any other method. Scrubbing, soaking and steam don't even come close. It is powerful enough to remove proteins, waxes and heavy oils, and penetrates to deflux circuit boards and SMDs, yet gentle enough to clean tiny precision assemblies. Ultrasonic sound waves moving through a cleaning solution create an effect called cavitation, the rapid formation and implosion of microscopic bubbles.
Heat enhances the process.
This is the source of ultrasonic effectiveness in cleaning. Easier to handle and safer to fill. Sealed tight to prevent leaks. The controls are easily accessible and resistant to spills. The control board is mounted high and vertically, to stay dry.