Boiling has been used through the ages as a standard way to disinfect clothing, bedding, tools and other household objects. While this suggestion may conjure an image of Cinderella slaving over a black cauldron, boiling to disinfect is just as useful today as it ever was (but you'll probably be safe using a simple pot instead of cauldron).
Kitchen sponges and dish rags, for example, are breeding grounds for a host of disease-causing germs, but you can disinfect them by boiling them in water for several minutes every few days. Remember, also, to allow them to dry out thoroughly between uses by having two available and alternating between them.
Adapted from "101 Old-Time Country Household Hints," © 2008 Publications International, Ltd.