I just bought a Swiffer wetjet today in an effort to improve the state of my kitchen floor, and I wonder how to refill the bottle without causing a problem with it. The manual says don't, of course, but I've read about other people refilling it with vinegar and water, etc, and I'd like to do that too. I'm not interested in having to buy refills of the cleaner or pads, I just want to use something safe like vinegar and water and old cloth diapers for the pads. So...how do you do it?