When cleaning old, fragile quilts, place a bed sheet on the bottom of your bathtub to rest the quilt on. Test for colorfastness then soak with your favorite detergent for at least 6 hours. Do not agitate. Let dirty water drain. Fill tub again and soak overnight. Rinse, Rinse, Rinse. Use the sheet to lift the quilt to prevent the fabric from tearing. You'll need lots of towels. Place quilt between towels while pressing to transfer some of the water. On a bright, warm sunny day, gently place outside on the lawn to dry.