Spring cleaning often focuses on reducing clutter, but it can also be an opportunity to reduce potentially harmful bacteria within the home. Start with areas that are likely to have sources of growth, such as kitchens and bathrooms. Thorough cleaning in those areas should include more than the usual suspects. For example, microwave ovens and toothbrush holders can be effective breeding grounds for bacteria. In fact, any place where moisture can linger (such as sinks, sponges and dish cloths) will provide a robust environment for a myriad of microbial colonies. Other common haunts are well-known: handles, doorknobs, keypads and hand-held devices. Grooming products like hairbrushes, pedicure tools and makeup applicators can be a hotbed for fungi. If at all possible, confine these items to individual use, and keep them clean.