Sour, fermented, or off smell
Slimy or mushy rind
Mold on the rind or stem area
Soft, watery, or sunken spots on the outside
Cracked, leaking, or split skin
Dull, dry, or shriveled appearance
Hollow or unusually flat sound when tapped
Flesh that is mushy, grainy, or stringy
Flesh with brown, black, or dark discolored spots
Flesh that looks dried out or separated from the rind
Sour, bitter, or unpleasant taste
Excessive bubbling, fizzing, or fermentation inside
Visible mold or unusual discoloration after cutting
Left unrefrigerated for too long after cutting
Past its normal storage time and showing spoilage signs