Evaluate cleanliness of a particular area or an item can be sometimes very difficult and daunting task. More so, if the items to be evaluated are complex and constructed from porous materials. There are virtually no guidelines on what is considered to be clean and what not, with the rare exception of industrial clean rooms, hospital environments and pharmaceutical industry. But when it comes to domestic environment any publications are very vague. This is quite understandable as domestic cleanliness is a personal issue very hard to sensibly quantify.
When I come across a project which requires evaluating domestic cleanliness I always clearly define the criteria which I am going to use and define the baseline of the appropriate marker against which I am going to evaluate.
In this recent case I was asked to evaluate the effectiveness of the deep clean carried out on items of soft furnishing following water damage and subsequent mould contamination of the property. Because of the mould being the primary concern I have selected the mould spore concentration as the most suitable marker for evaluation.
Prior of the deep clean we have decided that 100% elimination of moulds spores from a porous soft furnishing is not practically achievable given time/cost limitations. All the parties involved agreed that 95% reduction is reasonably achievable as the bases for the evaluation.
After some discussion with the contractor and tweaking of the cleaning methods they proceeded with the deep clean. All the items have been tested according to the devised protocol and found satisfactory cleaned
By Tomas Gabor