In this demonstration, precision aerospace parts are ultrasonically cleaned. The contaminant is fluorescent die penetrant that glows with the assistance of a black light. This cool demonstration vividly shows the ultrasonic cleaning process in a ‘whole new light’. Actually we thought this demonstration might be a flop because it involved a darkened room and ‘props’ (the black light) to capture the process. However, it turned out to be pretty cool. It shows in a very unique way how ultrasonics lifts contaminants off surfaces.