Did you get that idea off Pinterest? Baking soda and vacuum?!...pffft...customer can do that without you...There goes my $80 for a king charge.Although we don’t usually notice our own bodily smells, over time sweat can build up and lead to an unmistakable funky aroma. To rid your mattress of rankness, sprinkle it well with baking soda and gently rub it in with a scrub brush, so it gets into the mattress fabric where the stink lives. Let the baking soda sit for 10 minutes, and then vacuum it.