I'm guessing string for commercial, sponge for household use.
  Gotta change the water frequently though. Gets stinky. As a
  teenager, I was custodian of my church. Figured out the hard way
  to keep rinse and dirty and chemical separate. Shiniest floors
  and nobody slipped. = Age 13-18, every day after school. [it was
  also a 5-day a week nursery school + hosted ALL the Indian
  weddings. I got to taste some exotic foods as a kid that I love
  to this day]. Also did commercial carpet cleaning for a few
  years. I can clean ANY room of any condition top to bottom in no
  time. And if I'm rushed for time, I can "spot clean" and you'd
  think I did the whole thing. Hint: The places where dimensions
  meet. Corners. Floor/wall wall/cealing.. bases of furniture.
  Edges. You can skip the middle entirely if you have to as long
  as you pick up loose bits and brush the carpet. Nobody knows.
  But usually I was very thorough. I can make mirrors shine too.
  == Yeah, I was always 50/50 on the social gender role scale. I
  can also chug a beer without breathing in one go. Sometimes I'll
  do it when people beg me to. The burp is fantastic. == Just had
  hot soup someone made. It had hot taco seasoning in it on top of
  the beef broth. It was doubly-hot. Loved it. It was a hot
  minestrone with mexican flair. Good shit. == Well, the
  undercurrent of melancholy - the stream that runs under the
  stream is slowly progressing forward, trying to suck me under
  into the mire and the mud and tangle me up into its cluches. But
  I swim on my back and look up instead and fart on the monsters
  that try to pull me under. works well enough. ==