A.F.
Hi H.!
Don't use bleach! It will RUIN your bras, breaking down the fabric and the elastic. Bleach is also a toxic chemical and I would not want something washed in bleach to touch my breasts and then nurse.
Most people do not know the dangers of bleach or the effect that it has on them.
Have you tried Borax? It's a powder and you can find it in a green box at Wal-Mart. Throw a half cup in with your laundry, add some vinegar in your softener dispenser and say goodbye to yucky smells!