Caulk in bathrooms and kitchens accumulates mold and mildew faster than any other surface. Even when everything else is spotless, darkened caulk makes entire rooms look dirty.The problem is that mold feeds on the organic materials that naturally accumulate in these spaces. Add trapped moisture, humidity, and lack of airflow, and you've created a mold paradise.Fortunately, cleaning caulk doesn't require harsh chemicals or professional help. Two simple methods eliminate mold stains completely. Here's how to restore your caulk and prevent mold from coming back.What you need before startingWhite vinegar and a spray bottleBaking soda and a small bowlWarm waterAn old toothbrush or soft-bristled brushHydrogen peroxide (for stubborn stains)Clean cloths for rinsing and dryingOnce you've got everything together, you're ready to start tackling the mold safely. Wear gloves and a mask when working with it, and open windows and run exhaust fans to keep the area well ventilated.Never mix bleach with ammonia or other cleaners — the combination creates toxic fumes. Bleach also breaks down caulk, so stick with the gentler options you've already gathered, like the vinegar or hydrogen peroxide. How to clean mold and mildew from caulk