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Whether the pesticide residues are cleaned is the most concerned issue in the home kitchen cleaning. This may lead to excessive water consumption in order to make the best possible to clean the pesticides. This product named as INSPECTOR is a sink strainer which can detect whether there are pesticides in the water. If the water passing through the sink strainer contain the pesticide, the color of the middle part of the sink strainer will become white. Otherwise, it will be yellow. Using the INSPECTOR can achieve the water-saving.