In ultrasonic cleaning, it is a must to use an ultrasonic cleaning solution. While water and other cleaning solutions can also remove dirt and other contaminants from objects, many contaminants can only be removed by ultrasonic cleaning solution. Moreover, because this type of cleaning solution is specially made for ultrasonic cleaning, it is the most compatible liquid with ultrasonic cleaners.
An ultrasonic cleaning solution contains surfactants that make the surface tension of liquid low. Low surface tension promotes production of cavitation bubbles. Also, when ultrasonic energy is applied to an ultrasonic cleaning solution, the solution removes even the most bonded contaminant from the objects inside the ultrasonic cleaner.