Wipe the laminate wood flooring The expired acidic milk should be diluted with water and then sprinkled onto the laminate wood flooring with a mop. Because lactic acid is a natural stain remover. In addition, milk contains proteins and fats and other substances, can form a protective film on the wooden floor, not only to make the wooden floor shiny as new, but also to protect the surface layer of the floor, reduce wear and tear and scratches. The leather shoes to remove the dirt on the shoes, with gauze jiao take expired milk evenly coated in the shoes, dry and then wipe with a dry cloth, the shoes can be shiny as new, and there is a role is to prevent the leather surface dry crack. Scrubbing leather furniture Scrubbing leather with a milk-soaked rag will give it a new look. If you want to deeply treat leather goods, apply milk and let it air dry thoroughly before polishing. Milk will close up cracks and wear in the leather and make it look shiny and new. Get rid of ink stains on clothes Wash your clothes with water and then pour in expired and sour milk and scrub gently to remove ink stains from your clothes. Get rid of oil stains After repairing your car, your hands will get dirty with oil stains and dust. At this time, mix oats and milk to make a paste and rub your hands to remove dirt and moisturize them, making them softer and more tender. Rust Removal Use sour rotten milk (or add some vinegar to milk) to soak silverware to remove rust spots and tarnish from the surface of silverware. Just rinse well after soaking and wipe dry. It can also be used to polish furniture. While deeply moisturizing the wood, its acidic composition can also remove dust and dirt with great effect. Repairing Cracks in Porcelain If your porcelain has developed minor cracks, you can put it in a pot, pour in milk to soak it, heat it to a boil, then turn down the heat and simmer it on a fine flame for 45 minutes. The proteins in the milk will combine with the clay in the porcelain and mend the cracks. Hair care Dilute the expired yogurt a little with water, then rub it evenly on washed wet hair like a conditioner, massage it in slightly and wash it off with water, it will make the hair lube shiny. Make fish bait Fermented and sour milk is the best additive for making fish bait. Those who like to fish can mix sour milk with bad food, which is the favorite bait of grass carp. Watering flowers If the expired milk already has a distinct sour smell, you can use it to water flowers. You can dig a small hole in the middle of the flower soil and bury the milk in it, so that there will be no unpleasant smell. Note that you should not use too much milk, and only use it a second time in about a month.