Excellent sterilization needs premium washing process to prevent infections. All instruments need to be gently cleaned before packing and sterilization.
Logically, it’s not possible to check the washing quality by visual inspection. Most of the remained soils and tissues have protein, this counts also for the microorganisms. If manual washing or washing machine can remove the proteins from the instruments, then the washing phase is executed successfully and the content is ready to be packed for sterilization process.