Alcohol disinfection is not needed to water, because the 75% concentration of medical alcohol itself belongs to the concentration of disinfection is not needed to water, if the concentration is too low alcohol can enter the bacteria, but not able to make the bacterial protein coagulation, the same can not be completely killed bacteria. If the concentration of alcohol is too high, it will form a protective film on the surface of the bacteria, and it is difficult to kill the bacteria completely, so many studies have proved that only about 75% of the alcohol disinfection effect is the best. Alcohol disinfection is not recommended to spray, it is recommended to use wipe or wipe the way, you can use alcohol to wipe the phone, glasses, you can also wipe the desktop, door knobs, switches, garbage cans, etc., the use of alcohol disinfection need to pay attention to the indoor ventilation to avoid open flames.