How to Handle Water Stains on Your Ceiling

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First, find the source—often a leaky pipe or roof—and fix it. Once dry, gently scrub the stain with a bleach-water mix (1:3) to kill mold, then rinse. For paint, spot-prime with stain-blocker, let it dry, and repaint with flat ceiling paint. Wear goggles and gloves; if the stain is large or persistent after drying, you may need to patch and retexture the area.