Colonoscopes are expensive medical devices whose main part consists of flexible fiber-optic tubes designed to flexibly pass through the twisting and turning portions of the intestines under a doctor's control. After each use, the colonoscope is rigorously cleaned and sterilized by the hospital to kill any germs that may be present and to ensure that it is safe for the patient the next time it is used. Although the tube of the colonoscope is not changed for each person, its safety is guaranteed after a strict and repeated sterilization process. However, it should be noted that the sterilization process needs to be carried out under professional equipment and operation to ensure the effectiveness of sterilization.