In hospitals, 75% alcohol is usually used to clean and disinfect the skin, such as injections and infusions are cleaned and disinfected locally with alcohol. Therefore, this is the most common way of alcohol application, and spraying alcohol is rarely used for disinfection in the clinic. Spraying alcohol has two unfavorable factors as follows: 1, whether the concentration of spraying can reach the effective concentration of sterilization, if not guaranteed, it still does not play an effective role; 2, spraying alcohol is also a potential safety hazard, after encountering a fire source may catch fire, or even explode. Therefore, generally do not encourage the use of spray alcohol method of disinfection, mainly with the method of wiping. If there are objects to be disinfected, they are also directly disinfected by rubbing alcohol. Source: Dr. Yurai