In the first part of this paragraph I have written about commercial cleaning. Now I want to write what is it. Commercial cleaning is cleaning of work places such as offices etc. It is being offered by cleaning companies (for example clean Chicago companies). In my opinion every boss should perform and pay for such cleaning from time to time. It will improve working conditions which can be very important for employees. There are many cleaning companies, so you don't have to look for them for a long time.