ChatterBank1 min ago
plague
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For how long has a brush been in use that would reduce its plague removing ability up to 30 Per cent than a new one ?
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For more on marking an answer as the "Best Answer", please visit our FAQ.It all depends on what the person is wearing while using the brush and the weight of their clothes therefore reducing or improving their brushing technique. Also if there is a prevailing wind then small particles of toothpaste may go astray thus not removing the plaque as much. Therefore the answer is fourteen and a half minutes unless it is a leap year.