What are the three factors that can have an impact on the effectiveness of a disinfectant?

The effectiveness of a disinfectant can be influenced by three key factors: contact time, concentration, and the presence of organic matter. Contact time refers to the duration the disinfectant must remain wet on the surface to effectively kill pathogens. Concentration affects the strength of the disinfectant; higher concentrations usually yield better results. Lastly, organic matter, such as dirt or bodily fluids, can shield microorganisms and reduce the disinfectant's efficacy.