Sour, fermented, or alcohol-like smell
Mold on the skin or stem
Very soft, mushy, or leaking flesh
Dark brown or black spots spreading on the skin or inside
Wrinkled, shriveled, or dried-out skin with no firmness
Slimy texture
Off taste that is bitter, sour, or fizzy
Large bruised or sunken areas
Fruit that feels unusually light and hollow
White, gray, or fuzzy growth near the stem or cut surface