There is a lot of media attention on spray guns and many companies touting their use of electrostatic spray guns as being the state of the art in applying disinfectant. What they do not tell you about is that electrostatic spray guns are only superior when applied to conductive surfaces. Look around your work area. Most of the surfaces are non-conductive.
Bio1 offers two types of COVID cleaning. One is with a fogging machine. This sprays disinfectant. The other is manual wiping. Manual wiping is superior because it has both the chemical action as well as friction which helps break down the protein shell of the virus.
Please do not be tricked into thinking that electrostatic is a superior method or other methods are inferior.
See this impartial article from the US Environmental Protection Agency.
A surface needs to have a negative charge for the electrostatic sprayer to properly coat it. It is not like the sprayer stops once a surface is thoroughly coated. It just keeps spraying and at that point, is not different than a fogging machine.