I try to avoid television advertisements, devoting advertising breaks to calls of nature and minor domestic tasks, but every so often I catch something about some concoction that is supposed to 'kill 99.9% of germs'.
I once read that bacteria can reproduce every half hour. At that rate of reproduction, a colony of bacteria diminished by 99.9% would be restored to its original strength in only five hours. The statistically impressive slaughter may amount to less than naive users might hope.
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Gosh, just think how quickly natural selection can act with nearly five generations a day. At that rate housewives who clean too often are going to be knee-deep in invulnerable bacteria before the end of the month.
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