...and some don't? After reading a multitude of posts on this and other websites there simply seems to be no rhyme or reason: sometimes someone will get a brush that smells--& the levels of stank vary from person to person and brush to brush--and then again sometimes a person will get one that doesn't reek at all. And, oddly, sometimes these can come from the same manufacturers! How does this happen? Can someone please explain this 'stank factor' to me?