I had a client a number of years ago who had pressed her quilt with the BLUE be Gone still on. I was sure it was ruined but I followed the instruction on a product called Le Blanc Linen Wash. Just Google and it seems to be still available. Use to buy it in bedding and linen stores but now so many have closed their doors. I followed the instructions and let it soak overnight. I was quite surprised when the blue markings were gone and never returned. I wash everything that is delicate with the product.