There are a few telltale indicators that your bell pepper is terrible, and you may save money by eating the final one instead of tossing it out. A dash of pepper should be used within three to four days of purchase and free of brown or black blemishes. The pepper is terrible if the skin develops wrinkles. Weighing a pepper is the best way to tell if it’s rotten. Some bells have a thinner middle, while others have a thicker middle. The pepper’s weight is a good indicator.