Soft, mushy, or collapsing texture
Wrinkled, shriveled, or very dull skin
Brown or black spots that are large or spreading
Mold on the skin or stem
Slimy or sticky surface
Strong sour, rotten, or off smell
Interior flesh that is brown, gray, or mushy
Excessive seediness with bitter or off taste
Stem or cap that is dried out, moldy, or discolored
Eggplant that feels unusually light, hollow, or dried out