84 disinfectant should not be touched directly by hand, because the main component of 84 disinfectant is hypochlorous acid, which is an acidic liquid with strong irritating and corrosive effects on skin and mucous membranes. 84 disinfectant needs to be diluted with water, the ratio is 1:29, that is, 1 part of 84 disinfectant should be diluted with 29 parts of water. The surface of the object can play a disinfection, sterilization role, the new coronavirus also has a certain role in disinfection. However, pay attention to try to disinfect by wiping, rather than spraying in large quantities. Because 84 disinfectant is volatile, it can evaporate irritating odor and damage human airways.