We use an electrostatic sprayer which sprays a fine mist that gets into every nook and cranny. We follow up the disinfectant with an Antimicrobial that bonds to the surface and creates a layer of protection that kills any germs that come into contact with it. It's the same chemical makeup as microban that's in clothing we buy, although it's water based so it's non toxic and very safe to use. We have done several schools, days cares and playgrounds.