When I tell someone that I have city and guides in cleaning science I get one of two reactions. The first is because it has the word science they think its not practical. This is not true its very practical and makes cleaning so much easier.
The second is everyone thinks that cleaning is about removing dirt and it is the first reason to clean something but more important is cleaning in a effectually and in a hygienic way. cleaning is really about health and its importance is over looked in favor of appearances.