 As far as I know, there is very little good empirical evidence disproving the effectiveness of the DSB concept. On the other hand, there is very little proving it. If you are trying to achieve a DSB, I wouldn't vacuum it. Otherwise, do as you see fit.
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-Quinn
Man, n. ...His chief occupation is extermination of other animals and his own species, which, however, multiplies with such insistent rapidity as to infest the whole habitable earth, and Canada. - A. Bierce, Devil's Dictionary, 1906
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