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We scan a tile with colour assessment software then stain the tile with simulated faeces, based on a National Aeronautics and Space Administration (NASA) formulation. Yes, such a thing does exist.
We then apply the cleaner to the tile and use a mechanical scrubbing arm to clean the tile. The tile is then rescanned to assess how clean the tile is. This is repeated three times and the results are averaged.
This information is available to Consumer members only.