Disinfectant is only good while it is wet. Once it has dried on the surface it is no longer active. The surfaces will be free of germs and contaminations but as soon as a person or animal enters the area the room or surfaces can be compromised again. This is why we strongly recommend applying our 90-day antimicrobial protection. This protection is applied to a disinfected surface and will continue to destroy microorganisms on the surface 24/7.