We love a shiny clean surface.  In fact, we subconsciously attribute shiny with clean.  Perhaps its in knowing that dirt will interfere with a naturally shiny surface.  The fact, is however, this affinity of gloss can be used against us, and is by many unscrupulous cleaner manufacturers.

If clean is the absence of dirt, then naturally we would be disappointed if someone told us a product that was sold to us a cleaner was actually depositing an oil or a wax to the surface.  It maybe shiny, but it is certainly not clean

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