Solvents can accomplish this due to the unique nature of the chemistries. For example, if a device has complex geometries, production debris can become trapped in tight spaces, making cleaning with high-boiling fluids difficult and inconsistent. Quality standards on finished components may require black light inspection, particle count, water break or other analysis to confirm cleanliness.
Cleaning with solvents has been a fine choice because they are stable and highly effective. These fluids also are low in viscosity and surface tension, which allows them to get into tight crevices and wet all the surfaces of the parts. They also offer high solvency (“Kb Value”) which allows them to rigorously clean the surface and displace stubborn soils. All of these factors combine to produce the best possible cleaning at the lowest cost-per-part-cleaned.