I also wash my finished quilts. I pre-wash my fabrics, but use starch and spray baste, and I want to make sure that is washed out. I've also handled the quilt extensively while making it. I have a smoke free, pet free home, but the quilt is still subjected to everything going on in my house. I don't have a dedicated sewing room. I use our dining room, which is right off the kitchen, and the three season porch. Plus, as Jane said, I know the recipient will wash it, and I want to make sure it washes up nicely.