[header] How to tell if something's spoiled [title] Look for soggy edges. [step] Leafy vegetables will become soggy and/or slimy when they are spoiled. If left for too long, they will begin to turn brown and develop a slimy coating. 
Discard any leafy vegetables that look like this, as they are inevitably spoiled. [substeps] You will also notice obvious signs of spoilage in carrots if they are softer and a paler orange color than before.