So, how do you know if your corn syrup has gone bad? Well, there are a few tell-tale signs to look out for. First, check the color - if it's become darker or developed an off-color tint, it's likely gone bad. You should also check the consistency - if it's become thicker or thinner than usual, it's time to say goodbye.
Another sign of spoilage is the presence of mold or yeast - if you notice any fuzzy growth or bubbles in the syrup, it's time to toss it. And, of course, if it smells off or has a , it's definitely gone bad.