Add Yahoo as a preferred source to see more of our stories on Google. Person holding a new kitchen sponge in one hand and an old, tattered sponge in the other. - Ladanifer/Getty Images Sponges are ...

You may cringe each time you wring out your dirty, old kitchen sponge, thinking you should replace it. And often, you then forget. But you really should swap it out for a new one – and probably more ...