Question 1

Cleaning removes loose soils, preparing the surface or object to be disinfected. Disinfecting kills germs on the surface, preventing them from spreading. If a surface is not cleaned first, germs can hide under soils and reduce the efficacy of the disinfectant.

Question 2

There are five key factors involved when cleaning that are equally important: time, temperature, mechanical action, chemical reaction and procedures. Balancing these factors will produce the best possible results.