To find the most accurate and up-to-date information, I recommend checking the product label or visiting Nestlé's official website for specific storage guidelines and recommended shelf life after opening. Typically, sweetened condensed milk can last for a few days to a few weeks in the fridge after opening, but it's essential to follow the manufacturer's instructions for the best quality and safety. When in doubt, it's better to dispose of the product if it has been open for an extended period or if you notice any changes in texture, odor, or taste.