The danger: In a study published in Environmental Health, Silent Spring Institute researchers found women who used air fresheners and cleaned using mold-and-mildew-attacking cleaners (particularly bleach-based ones) were more likely to develop breast cancer compared to women who nixed these questionable household products.
Safer solution: Try this basic bathroom cleaner: Dissolve baking soda in water for spraying or sponging (1/8 cup per quart of water), sprinkle it dry on a damp sponge, or, for tough areas, make it into a paste with a little water. Baking soda has been found to kill certain types of mildew, and for the types it can’t kill, its mild abrasiveness allows you to scrub the stuff away. It’s safe for most surfaces, but you might want to test a small area first if you have any doubts. Apply the baking soda, either in spray or paste form, leave it alone for an hour or so, and then scrub with a soft brush or old toothbrush. Wipe and rinse well when finished.