What determines quality in professional cleaning?

What defines quality of cleaning, what do we want to achieve by cleaning and what exactly determines cleaning quality? Paul Harleman, global application manager for Vileda Professional, addresses these key questions.We need to clean the world we live in. Since humans have settled down and are not, like animals in the wild, moving from one spot to the other every day, the need to clean the places where we live, work and relax is there. That is basically the origin of the need for cleaning. Whethe