Yes, ranch sauce will go bad if you don't refrigerate it after opening. Ranch sauce typically contains perishable ingredients such as dairy products (like buttermilk or mayonnaise) and sometimes eggs. These ingredients can spoil quickly if left at room temperature for an extended period.
Bacteria can grow rapidly in food that is not properly refrigerated, leading to potential foodborne illnesses and spoilage. To ensure the safety and quality of your ranch sauce, it's essential to refrigerate it after opening.
Always check the label for specific storage instructions, but as a general rule, refrigerate ranch sauce promptly after opening and follow any recommended expiration dates or use-by dates provided by the manufacturer. If you notice any changes in color, texture, or smell, or if the sauce looks or smells off, it's best to discard it to avoid any health risks.