An improved process for the concurrent, low temperature cleaning and sanitation of solid surfaces is provided. This process involves introducing a cryogen and an antimicrobial liquid into a vessel, thereby creating an immersion bath. A sterilant is then introduced into this immersion bath. An object to be cleaned and sanitized is then immersed in this immersion bath for a first period of time. Mechanical energy may be introduced into this vessel for a second period of time.