For cleaning any surface, household items such as mops, sponges, wipes, steaming devices, and chemicals are often effective. Applied vigorously they remove dirt and germs. However, when a virus like Covid-19 strikes, routine cleaning is simply not enough. Removing germs from surfaces is not the same as killing them. True thoroughness requires reliable disinfectants and an effective process for their application. Any area frequently touched should be regularly cleaned and disinfected. These include tables, hard-back chairs, doorknobs, light switches, handles, desks, shelves, toilets, faucets, sinks, and kitchen counters, as well as floors and carpets. To eliminate disease-causing microbes like the Coronavirus, the CDC recommends the frequent disinfection of hard surfaces with EPA-registered products. There are several EPA approved technologies for spreading disinfectants. Their purpose is to get the liquid where it should go and make sure it lingers long enough to eradicate germs. Electrostatic sprayers and ultra low volume (ULV) foggers are the most common; but based on overall efficiency and cost effectiveness, ULV foggers are the more reliable. Electrostatic soray machines give chemicals an electric charge that helps them stick to surfaces. They have been effective in agriculture and the automotive and tanning industries. Only recently, though, have they been used for. Overall they are superior to traditional backpack sprayers, yet ULV foggers are superior to both. ULVs create small droplets in a cold fog dispersed in a high-powered air stream. The particles' size can be adjusted. This feature gives the fogger versatility for different types of applications. Another benefit is the cold fogging, which does not reach high temperatures and allows usage both indoors and outdoors. In janitorial applications UV foggers treat entire areas with disinfectants mixed with water at a ratio of 4-8 ounces to 1 gallon of water. This mixture is released into the atmosphere at between 10 to 20 microns (micron is an abbreviation for "micrometer"; a typical human hair is about 75 microns across). Water-based disinfectants differ from electrostatic-ally charged chemicals in multiple ways. For example, they continue working whether wet or dry. Their disinfecting is an ongoing process that protects against pathogens repopulating surfaces beyond immediate application. Surfaces will not be harmed. Most important, the United States Environmental Protection Agency declares them safe for places where humans and animals are present.