Wow, vacuum them? I would've never think to do that! When I started reading your reply, I was thinking, "Is she playing a joke on this newbie??"
ETA: PrairieGem, I just realized that I might of come of as dismissive of your reply. I did not mean to be. I hope you did not take it this way. I have no hairy creatures running about, so vacuuming probably wouldn't be necessary for me. I was thinking that maybe rinsing them under water, with a little soap, might do the trick. I wasn't sure if the soaking would damage the neoprene, but you've answered that question for me!