3. Getting the Stain Off Enamel Ware Bleach Method 1. Fill the enamel ware with cold water. 2. Add 1 teaspoon of bleach. 3. Leave to stand overnight. 4. Rinse the next morning. Be sure to rinse well and clean all the bleach off. Lemon Juice Method 1. Squeeze some fresh lemon juice. 2. Rub the lemon juice and salt over the stain. 3. Rinse off. 4. Dry. The stain should be removed.