This is something I'm vigilant about. I've noticed the quality of kitchen sponges seems to have deteriorated over the years, and they don't last as long as they used to. I think they seem to get slimy quickly, despite using vinegar on them, or sometimes lemon juice or even bleach. I tend to replace mine every two weeks, and I keep sponges for washing the pet dishes and also for cleaning the sinks. I've tried using cloths, but they seem even worse, and also can be unwieldy, and make more of a mess than they're worth. Do you use kitchen sponges? If so, how often do you replace them? If not, what do you use?